You will need an extraction tool like WinRAR , 7-Zip , or The Unarchiver to open the .rar archive.
Because .rar files can contain executable scripts, it is highly recommended to scan the extracted folder with VirusTotal or your local antivirus before opening any files.
If you found this file on a specific forum or repository (like GitHub or a niche technical site), it typically contains several files (PDFs, text files, or images) bundled together. How to open and use this file: