If you received this file from an untrusted source or an unexpected email, do not open it. Compressed files like .zip are commonly used to deliver malware. If you were expecting it, you can extract it using standard tools like Windows File Explorer, WinRAR , or 7-Zip to see the actual files inside.
: A set of promotional photos, logos, or documents for a brand named "Karhu" (such as the Finnish sports brand). karhupaketti.zip
Do you have a specific where this file originated so I can give you a more precise answer? If you received this file from an untrusted