Could you share or what it is supposed to contain so I can give you more specific advice?
Avoid extracting the contents of the archive until you have verified its source and safety. pack j89.rar
Upload the file to VirusTotal to scan it against over 70 different antivirus engines simultaneously. Could you share or what it is supposed
If you must open the file to see what it is, do so only inside a secure, isolated environment like Windows Sandbox or a virtual machine. do so only inside a secure
Ensure your operating system is set to show file extensions. Attackers sometimes use double extensions like pack j89.rar.exe to trick users.