Did you just download a file that has been digitally signed by Nitro PDF Software and wonder if the file is safe? If that's the case, please read on.
You will typically notice Nitro PDF Software when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:
You can view the additional details from the Nitro PDF Software digital signature with the following procedure:
Here's a screengrab of a file that has been digitally signed by Nitro PDF Software:
As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by Nitro PDF Software and that the file has not been tampered with.
If you click the View Certificate button shown in the screengrab above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also examine the address for Nitro PDF Software, such as the street name, city and country.
COMODO Code Signing CA 2 and UTN-USERFirst-Object has issued the Nitro PDF Software certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Nitro PDF Software files I've collected, thanks to the FreeFixer users.
The FreeFixer tool treats files from Nitro PDF Software as safe, which means that the Nitro PDF Software files will appear with a green background and that there's no removal checkbox for the file. However, as you can see in the scan results below, a few of the anti-virus scanners detects the Nitro PDF Software file(s). My guess is that those detections are false positives and that the files are safe. It's unlikely that Nitro PDF Software would ship a malware file.
Detection Ratio | File Name |
---|---|
1/48 | nlssrv32.exe |
1/50 | NitroPDFDriverService8x64.exe |
0/42 | ASTSRV.EXE |
0/42 | NLSSRV32.EXE |
0/50 | NLSSRV32.EXE |
0/55 | nlssrv32.exe |
0/54 | nlssrv32.exe |
0/51 | NLSSRV32.EXE |
0/49 | NLSSRV32.EXE |
0/48 | nlssrv32.exe |
0/46 | NLSSRV32.EXE |
0/56 | NLSSRV32.EXE |
Here's the detection names for the Nitro PDF Software files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
As mentioned above, I think these detections are false positives since it is very unlikely that Nitro PDF Software would ship a malware file.
Scanner | Detection Names |
---|---|
Antiy-AVL | Trojan/Win32.SGeneric |
Emsisoft | Gen:Variant.Symmi.29425 (B) |
The detection percentage is based on that I've gathered 4566 scan results for the Nitro PDF Software files. 2 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan reports by examining the files listed above.
The analysis is done on certificates with the following serial numbers: