A widely recommended free tool. You can right-click the file and select "Open archive" to see the list of filenames inside without running them.

RAR files are compressed archives that can contain any type of digital data—such as documents, images, software, or videos—packaged by an individual user. Because this specific filename does not correspond to a well-known software patch, game mod, or leaked dataset, its contents are likely private or unique to the source where you found it. How to Safely Check the Contents

The original software for this format. It allows you to view the archive structure and read any included "readme" text files.