Did you just stumble upon a download or a file on your computer that is digitally signed by Now Media Corp.? Some of the security products refers to the detected files as Gen:Variant.Graftor.409651 and Trojan.Adkor.148. The detection rate for the Now Media Corp. files collected here is 32%. Please read on for more details.
You will typically see Now Media Corp. when running 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 Now Media Corp. certificate with the following steps:
Here's a screenshot of a file that has been signed by Now Media Corp.:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This implies that the file has been published by Now Media Corp. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also examine the address for Now Media Corp., such as the street name, city and country.
thawte SHA256 Code Signing CA and Thawte Code Signing CA - G2 has issued the Now Media Corp. 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 Now Media Corp. files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 11/56 | lwtclt.exe |
| 18/66 | nvcjet.exe |
| 31/68 | wscnvcsr.exe |
Here is the detection names for the Now Media Corp. files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Ad-Aware | Gen:Variant.Graftor.409651 |
| AegisLab | Adware.W32.Popad!c |
| Agnitum | PUA.PopAd! |
| AhnLab-V3 | PUP/Win32.Helper.R94281 |
| Arcabit | Trojan.Graftor.D64033 |
| Avira | ADWARE/Kraddare.1473808, ADWARE/Adware.Gen7 |
| BitDefender | Gen:Variant.Graftor.409651 |
| Bkav | W32.HfsAdware.E37A |
| CAT-QuickHeal | Pua.Kraddare |
| Comodo | Application.Win32.DownWare.~A, Application.Win32.Kraddare.K |
| Cybereason | malicious.862d9e |
| Cylance | Unsafe |
| DrWeb | Trojan.Adkor.148, Trojan.Adkor.68 |
| ESET-NOD32 | a variant of Win32/Adware.Kraddare.LC |
| Emsisoft | Gen:Variant.Graftor.409651 (B) |
| Endgame | malicious (high confidence) |
| F-Secure | Gen:Variant.Graftor.409651 |
| Fortinet | Riskware/Kraddare |
| GData | Gen:Variant.Graftor.409651 |
| Ikarus | not-a-virus:AdWare.PopAd, PUA.Kraddare |
| Jiangmin | Adware.Popad.g, AdWare.Kraddare.no, AdWare.Kraddare.cx |
| K7AntiVirus | Adware ( 004c665b1 ), Adware ( 004c875a1 ) |
| K7GW | Adware ( 004c665b1 ), Adware ( 004c875a1 ) |
| Kaspersky | not-a-virus:AdWare.Win32.PopAd.bia, not-a-virus:AdWare.Win32.Kraddare.xaf, not-a-virus:AdWare.Win32.Kraddare.xay |
| MAX | malware (ai score=97) |
| Malwarebytes | Adware.PopAd, Adware.KorAd |
| McAfee | Artemis!C020498862D9 |
| McAfee-GW-Edition | Artemis!PUP |
| MicroWorld-eScan | Gen:Variant.Graftor.409651 |
| Microsoft | PUA:Win32/Sidejet, PUA:Win32/Creprote |
| NANO-Antivirus | Riskware.Win32.Kraddare.erncdq |
| Panda | Generic Suspicious |
| Symantec | ML.Attribute.HighConfidence |
| TrendMicro-HouseCall | TROJ_GEN.R061H07FF18, TROJ_GEN.R061H0CFF18 |
| ViRobot | Adware.Agent.403184[h] |
| Webroot | W32.Adware.Gen |
| Yandex | PUA.Kraddare! |
| Zillya | Trojan.AdkorCRTD.Win32.4799, Trojan.AdkorCRTD.Win32.510 |
| ZoneAlarm | not-a-virus:AdWare.Win32.Kraddare.xaf, not-a-virus:AdWare.Win32.Kraddare.xay |
The detection percentage is based on that I've gathered 190 scan results for the Now Media Corp. files. 60 of these scan results came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis is done on certificates with the following serial numbers: