There are currently 11 AMBOSS add-ons listed on Add-ons for Anki 2.1 - AnkiWeb. Only one seems to be the the AMBOSS add-on. Some housekeeping would be helpful.
Here’s a list of the add-ons, if dae should decide to sweep through them:
So I wouldn’t trust any of those add-ons on AnkiWeb.
Well, there shouldn’t be obvious fakes on AnkiWeb, @dae
AMBOSS Official – Medical School Step & Shelf Study Resource
This one seems legit though.
I suspect this was just well-meaning users making it easier to download before Amboss decided to upload their own version. If you find an add-on that is doing something malicious, please let me know, but I’m afraid I don’t really have time to be curating the list otherwise - that’s sort of what the like/dislike buttons are intended to do