This tutorial explains how you can integrate ClamAV into PureFTPd for virus scanning on an OpenSUSE 11.3 system. In the end, whenever a file gets uploaded through PureFTPd, ClamAV will check the file and delete it if it is malware.Interesting use of ClamAV to automatically clean the "bad" files from your FTP server upon upload.
I do not issue any guarantee that this will work for you!
How To Integrate ClamAV Into PureFTPd For Virus Scanning On OpenSUSE 11.3 | HowtoForge - Linux Howtos and Tutorials