It is a best practice to scan any downloaded archive with an antivirus program like AVG or Windows Defender before extracting its contents.
The original software for this format. It is technically shareware but offers a free trial period. You can find it at win-rar.com . RPDFE11.rar
The or Keka are popular free choices found on the Mac App Store to handle extraction. Important Safety Tips It is a best practice to scan any