User209 postedIt is a false positive. The reason it gives is, WS.Reputation.1:
WS.Reputation.1 is a detection for files that have a low reputation score based on analyzing data from Symantec’s community of users and therefore are likely to be security risks. Detections of this type are based on Symantec’s reputation-based security technology. Because this detection is based on a reputation score, it does not represent a specific class of threat like adware or spyware, but instead applies to all threat categories.
This probably means that someone reported this as a threat at some point, or maybe Norton, just shows this false positive when it does not have any data about an executable.