Apologies if I'm using this wrong, or if this is the wrong place to ask this sort of question, however if you could still answer my question or direct me to the correct place, that would be greatly appreciated :)

Basically, I recently downloaded a brush that had been uploaded by a user with a username comprised of random numbers/letters that had been uploaded an hour ago at the time, and the description was brief (something along the lines of "The Brush :)) Use".) The brush didn't work, so I got worried it might've been some sort of malicious file. I tend to get overworked on this sort of thing, so before I got too worried I decided to sleep on it. Today, I've found out the page had been deleted by an admin, which of course freaked me out even more. (Oops)

So, basically what I'm asking is how brushes are uploaded onto the official website, why they might be taken down and if there is a possibility I need to scan my PC. I have a macOS Big Sur running version 11.2.1.

Again, apologies if this is the wrong area to ask this, but if somebody knowledgable were to answer that would be great, thank you :)