Files like this are frequently used as "trojans." A script-kiddy downloading a "fresh" list to start their own hacking career might find that the .rar file contains an infostealer . Instead of getting a list of victims, the person who runs the file becomes the victim, leaking their own cookies and passwords to the original uploader.
Typically structured as email:password or user:password , making them easy for software to read. 998K Private Combolist Fresh User-Pass.rar
A is essentially a massive text file containing pairs of usernames (or emails) and passwords. Unlike a raw database dump from a single website, these lists are often curated and cleaned to be used in automated "credential stuffing" attacks. Files like this are frequently used as "trojans
