I've downloaded an extension for Window Media Player. I used www.virustotal.com to scan. The result was in this permalink:

http:// www.virustotal.com/analisis/18a7583e1d9bf4616bd01dd2d97758bb

The file actually at this address:

<edited>

It contained a virus and it could not detected by BitDefender.

That file and all asociated data have been signed and detection should be available soon.