If an anti-virus program is running on the Discover target (repository), and it detects a virus within a confidential file that violates a detection policy, the AV solution may quarantine the file before Symantec sends the file through to detection. In this case, does Symantec create an incident?
It is recommended that anti-virus software be installed in a location other than the Symantec folders of a detection server.
Once file contents are opened and inspected, it is unlikely that the "cracked virus" would trigger AV detection. If an AV product is running on the target server, the file will most likely be blocked and recorded as an "unprocessable item".