Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.1.0.1 50.00%
6.1.0.1 25.00%
6.1.0.1 25.00%
(Note, Nitro PDF Software publishes each variation of this file with the same version, but the hashes are unique.)

Relationships

Parent process
Related files

PE structurePE file structure

Show functions
Import table
advapi32.dll
QueryServiceStatus, StartServiceCtrlDispatcherW, RegisterServiceCtrlHandlerExW, GetNamedSecurityInfoW, GetSecurityInfo, SetNamedSecurityInfoW, SetSecurityInfo, AllocateAndInitializeSid, SetEntriesInAclW, InitializeSecurityDescriptor, SetSecurityDescriptorDacl, FreeSid, RegOpenKeyExW, RegQueryValueExW, RegCloseKey, SetServiceStatus, OpenServiceW, ControlService, DeleteService, CreateServiceW, ChangeServiceConfig2W, OpenSCManagerW, CloseServiceHandle, StartServiceW
kernel32.dll
CreateFileW, WaitNamedPipeW, lstrlenW, SetNamedPipeHandleState, SetFilePointer, GetTickCount, CompareStringW, CompareStringA, GetCommandLineW, lstrcmpiW, RaiseException, GetQueuedCompletionStatus, CreateThread, ConnectNamedPipe, ReadFile, WriteFile, FlushFileBuffers, DisconnectNamedPipe, LocalAlloc, CreateNamedPipeW, LocalFree, DeleteCriticalSection, InitializeCriticalSection, LeaveCriticalSection, EnterCriticalSection, PostQueuedCompletionStatus, CreateIoCompletionPort, CloseHandle, Sleep, GetModuleFileNameW, GetLastError, lstrcpyW, SetLastError, CreateFileA, GetTimeZoneInformation, WriteConsoleW, RtlUnwind, HeapFree, HeapReAlloc, HeapAlloc, GetProcAddress, GetModuleHandleA, ExitProcess, GetCommandLineA, GetVersionExA, GetProcessHeap, GetStartupInfoA, TerminateProcess, GetCurrentProcess, UnhandledExceptionFilter, SetUnhandledExceptionFilter, IsDebuggerPresent, TlsGetValue, TlsAlloc, TlsSetValue, TlsFree, InterlockedIncrement, GetCurrentThreadId, InterlockedDecrement, GetCurrentThread, HeapDestroy, HeapCreate, VirtualFree, FatalAppExitA, VirtualAlloc, HeapSize, GetStdHandle, GetModuleFileNameA, SetConsoleCtrlHandler, FreeLibrary, InterlockedExchange, LoadLibraryA, FreeEnvironmentStringsA, GetEnvironmentStrings, FreeEnvironmentStringsW, WideCharToMultiByte, GetEnvironmentStringsW, SetHandleCount, GetFileType, QueryPerformanceCounter, GetCurrentProcessId, GetSystemTimeAsFileTime, GetCPInfo, GetACP, GetOEMCP, IsValidCodePage, GetConsoleCP, GetConsoleMode, MultiByteToWideChar, GetLocaleInfoA, GetLocaleInfoW, GetTimeFormatA, GetDateFormatA, GetUserDefaultLCID, EnumSystemLocalesA, IsValidLocale, GetStringTypeA, GetStringTypeW, LCMapStringA, LCMapStringW, SetStdHandle, WriteConsoleA, GetConsoleOutputCP, SetEnvironmentVariableA
shell32.dll
SHGetSpecialFolderPathW, CommandLineToArgvW
user32.dll
MessageBoxW

nitropdfreaderdriverservice.exe

Nitro PDF Professional by Nitro PDF Software (Signed)

Remove nitropdfreaderdriverservice.exe
Version:   6.1.0.1
MD5:   f9841fabc326607bf1e2fdc7f702100a
SHA1:   23a29cde0fc37146ef2319edd2f2d8e84619a2bd
SHA256:   b0927221d2dca91cb682e140f1931da2f9bea4142bc2fa5f7f6bd1e123b4221c

Overview

nitropdfreaderdriverservice.exe runs as a service under the name NitroReaderDriverReadSpool (NitroReaderDriverReadSpool) with extensive SYSTEM privileges (full administrator access) as a shared service. This is typically installed with the program Nitro PDF Reader published by Nitro PDF Software. The file is digitally signed by Nitro PDF Software which was issued by the The USERTRUST Network certificate authority (CA).

DetailsDetails

File name:nitropdfreaderdriverservice.exe
Publisher:Nitro PDF Software
Product name:Nitro PDF Professional
Description:Solid Spool Service
Typical file path:C:\Program Files\nitro pdf\reader\nitropdfreaderdriverservice.exe
Original name:Solid Spool Service
File version:6.1.0.1
Size:192.3 KB (196,912 bytes)
Build date:7/11/2010 5:12 PM
Certificate
Issued to:Nitro PDF Software
Authority (CA):The USERTRUST Network
Effective date:Monday, December 22, 2008
Expiration date:Friday, December 23, 2011
Digital DNA
PE subsystem:Windows GUI
File packed:No
.NET CLR:No
More details

ResourcesPrograms

The following program will install this file
Nitro PDF Software
24% remove
The software is typically bundled with third party installers such as Open Candy. "A free PDF reader that offers a range of advanced creation, editing and reviewing features, not found in other free PDF reader products."

BehaviorsBehaviors

Services
Runs under 'SYSTEM\CurrentControlSet\Services' as a shared service by the Service Host (svchost.exe)
  • NitroReaderDriverReadSpool
  • 'NitroReaderDriverReadSpool' (NitroPDFReaderDriverCreatorReadSpool)

ResourcesResource utilization

(Note: statistics below are averages based on a minimum sample size of 200 unique participants)
Averages
 
CPU
Total CPU:0.00003352%
0.028634%
Kernel CPU:0.00002003%
0.013761%
User CPU:0.00001350%
0.014873%
Kernel CPU time:47 ms/min
100,923,805ms/min
CPU cycles:7,308/sec
17,470,203/sec
Memory
Private memory:1.2 MB
21.59 MB
Private (maximum):3.48 MB
Private (minimum):48 KB
Non-paged memory:1.2 MB
21.59 MB
Virtual memory:38.41 MB
140.96 MB
Virtual memory (peak):39.41 MB
169.69 MB
Working set:228 KB
18.61 MB
Working set (peak):3.48 MB
37.95 MB
Page faults:3,009/min
2,039/min
I/O
I/O read transfer:25 Bytes/sec
1.02 MB/min
I/O read operations:1/sec
343/min
I/O write transfer:0 Bytes/sec
274.99 KB/min
I/O write operations:1/sec
227/min
I/O other transfer:0 Bytes/sec
448.09 KB/min
I/O other operations:1/sec
1,671/min
Resource allocations
Threads:4
12
Handles:60
600

BehaviorsProcess properties

Integrety level:System
Platform:32-bit
Command line:"C:\Program Files\nitro pdf\reader\nitropdfreaderdriverservice.exe"
Owner:SYSTEM
Windows Service
Service name:NitroReaderDriverReadSpool
Display name:NitroReaderDriverReadSpool
Description:“Nitro PDF Reader Driver Read Spool”
Type:Win32ShareProcess
Parent process:services.exe (Services and Controller app by Microsoft)

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows Vista Home Premium 50.00%
Microsoft Windows XP 50.00%

Distribution by countryDistribution by country

United States installs about 100.00% of Nitro PDF Professional.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Toshiba 40.00%
Dell 40.00%
Hewlett-Packard 20.00%
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