I received the trial but not comfortable with the files:

SHA256:    cace4169571a200306503d12a6098bbc0ef779ed6d74078ab40574ef6f345337
File name:    Udemy.exe
Detection ratio:    17 / 53
Analysis date:    2015-12-27 02:32:03 UTC ( 22 hours, 8 minutes ago )

Please explain