Zlob infections are related to p0rn sites !
This used to be true but it is not anymore. After Fake Codec Errors , Fake Flash Errors, Fake Flash Version, Faked MP3 Download.
Zlob infections familly (Rogue installer Antispycheck/IEAntivirus, DNS Changer, VAC) is also spread on Fake Cracks/Warez Blogs or Fake Softwares Downloads WebSites.
Notice the "*100% checked by Antivirus" comment ;)