Hello, welcome to Feralheart
It's always good to be cautious with internet downloads but I can assure you that Feralheart is completely safe. You will not get any viruses from the official download link found
here on the forum.
If you do happen to get a warning from your anit-virus then all you need to do is turn off the warning for Feralheart and let it install itself.
If you have any further questions just let me know