You can expand the column in the user interface to see the whole path.
You should not worry because "corrupted" doesn't mean "malicious".
Actually, the warning about corrupted archives only means that avast! was not able to unpack the archive and scan the content - either because it's really corrupted, or because the format of the archive is somehow new, unsupported by avast! (unlikely for CAB, I think, but possible).
Moving the file to Chest doesn't have much sense here - the Chest is for infected files. Actually, if you succeeded in moving the file to Chest (and the CAB wasn't really corrupted), you may turn the corresponding program non-functional.