Attackers often hide executable files (.exe) within archives, hoping users will run them after extraction.
High-density archives like this are common vectors for trojans, spyware, or ransomware. Malicious actors often use "mega-packs" as bait to encourage users to disable antivirus software for extraction.
For those who may not be familiar, a .rar file is a type of compressed archive file that is used to bundle multiple files into a single file. The .rar file extension is commonly used to distribute large files, such as movies, music albums, and software packages, over the internet. The files are compressed to reduce their size, making it easier to transfer and store them.