You can unable Virus Scanning in PeopleSoft (PeopleTools 8.5x) directly in the PIA (Webserver).
It's using a Java implementation of ICAP (Internet Content Adaptation Protocol) to call an antivirus service provider.
Now if you need to test it works, you can use a "safe" virus provided by the eicar.org.
The file uploaded to PeopleSoft will be sent to the antivirus service provider and rejected if it contains a virus.