If you must open it, do so within a virtual machine or a "sandbox" environment to prevent any potential scripts from accessing your main operating system.
Always run the file through an aggregator like VirusTotal to check for hidden trojans or scripts. BoyaVam.JenLo.rar
The .rar extension indicates a compressed archive. You will need a utility like WinRAR or 7-Zip to extract the contents. If you must open it, do so within