Did you just stumble upon a download or a file on your computer that has a digital signature from NEXON Corporation? If so, please read on.
You'll probably see NEXON Corporation when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the NEXON Corporation certificate with the following procedure:
Here is a screengrab of a file that has been signed by NEXON Corporation:

As you can see in the screenshot above, the Windows OS states that "This digital signature is OK". This means that the file has been published by NEXON Corporation and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap 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 see the address for NEXON Corporation, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA and VeriSign Class 3 Code Signing 2009-2 CA has issued the NEXON Corporation 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 NEXON Corporation files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/44 | CombatArms.exe |
| 0/43 | nmcosrv.exe |
| 0/51 | NGM.exe |
The detection percentage is based on that I have collected 138 scan reports for the NEXON Corporation files. 0 of these scan reports came up with some sort of detection. You can view the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: