I recently discovered a suspicious file in my friend's usb drive. His system had Quick Heal 9.0. The pen drive was also scanned with Norton Antivirus and also with Kaspersky antivirus. I uploaded this file to virustotal also but no virus was found .
But I am sure that this file contains a virus; Maybe it has been corrupted due to unsafe removal of usb drive.
Note : after extracting this file rename its extension from .pi to .pif