The .rar format itself isn't dangerous, but the inside can be.
A .rar file is a compressed archive format developed by RARLAB that bundles multiple files together into a smaller, more manageable package. Based on common search results, "polic.rar" often refers to: Download polic rar
Below is a blog post guide on what this file might be, how to handle it safely, and how to open it. Navigating the "Polic RAR" Download: What You Need to Know The .rar format itself isn't dangerous
Once you’ve downloaded the file, do not extract it immediately. Follow these safety steps: how to handle it safely