PFV-Exploit.D was spammed on January the 1st 2006 with subject "Happy New Year" and body text "picture of 2006". The email contains an attachement file "HappyNewYear.jpg" which exploits the Microsoft WMF SetAbortProc vulnerability.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
When the infected attachement is viewed on vulnerable computer, it tries to download and execute a file from web server www.ritztours.com. The file is a variant of Bifrose backdoor, detected as W32/Bifrose.KT.
Please see the following links for more details about the WMF vulnerability:
https://www.kb.cert.org/vuls/id/181038
https://www.microsoft.com/technet/security/advisory/912840.mspx