It should be noted that in order to use their free malware scanning service, it requires you to add their badge or a link to their website in the footer (or wherever) on your site.
Referrer Spammer based in Lithuania. Hits my web-sites on a regular basis with the following . . .
http://evuln.com/tools/malware-scanner/www.MYSITE.COM/
Changed my own site for MYSITE.COM