The general rule is not to open anything which has the file extension exe when you do not know where it has come from or you are uncertain what it is about. These are programs and when run can introduce nasties into your system. Although given a clean bill of health so far I strongly suggest that you delete it and do not try to find out what it contains. Application forms should have doc or pdf file extensions or something similar.
Samsung Galaxy A8 review: Hands-on