Hmm, can't be a coincidence that your download file contains a trojan, can it? Nice try. I could be mistaken.
I don't know if you're trolling or what, but nothing done by Mr.Antifun has any viruses. Some anti-virus programs like Avast will make some kind of a detection but it's a false-positive. It's because the trainer has to mess around with some game files to make the codes work.
Things like infinite health or stamina don't just happen just by activation, the trainer has to change things in the game files so that you actually have infinite health or stamina or you want to spawn items into your inventory. So some antivirus programs think this is doing something harmful to your computer and so it marks it as something potentially dangerous when in reality it's not.
If you think about it, a trainer is basically the PC version of a Gameshark or Action Replay for some of the older consoles and handhelds. They have codes in them that would change how the game works. Those codes from those things actually override the game's code in it's actual files so that those cheats will work. There were Must Be On codes (or [M] as you may have seen it) as well that you have to have or the codes will not work. Same thing with PC game trainers. Most or all trainers have to be activated before you can use the codes (like the Must Be On codes for Gameshark and Action Replay). The codes in the trainers have to override the game's code so that they can work and not break the game and have it freeze or whatever else. Because the Trainers have to do this, some anti-virus programs like Avast for example will detect that this program will mess with files like those and marks it as a virus and potentially harmful even though that's not the case at all.
I've been using many trainers made by Mr.Antifun for almost a year now and I can tell you for sure, there is nothing to worry about when you use a trainer made by him.
To each their own, but I will have to tell you, there is probably no safer site to get free, great, working trainers from than here. In the end it's up to you. There are plenty of shady places to get them from that will likely give you a virus, but you will probably wind up finding that out the hard way. If you don't want to get them from here, that's fine, but good luck to you if you want to get them somewhere else.