Compressed files are a common way to distribute malware because the contents are hidden until opened. If you do not recognize the source of "AN (3).rar," it is recommended to: Scan it with an antivirus tool like Malwarebytes .
Use WinRAR (the original software for this format) or the free, open-source 7-Zip . Mac Users: Use The Unarchiver or Keka . AN (3).rar
If this is from a workspace or email, it may represent the third revision of a project titled "AN." How to Access the Content Compressed files are a common way to distribute