Bloodhound.Flash.17 is a heuristic detection used to detect threats from multiple threat families such as Trojan.Swifi.
Files that are detected as Bloodhound.Flash.17 are considered malicious. We suggest that any files you believe are incorrectly detected be submitted to Symantec Security Response. For instructions on how to do this using Scan and Deliver, read Submit Virus Samples
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":