: Use binwalk -e c5k045fpmq56.zip to check for nested files or hidden data appended to the end of the archive.
Upload the file to an online sandbox like or Hybrid Analysis to see what happens when the file is interacted with in a safe, isolated environment. Datei herunterladen c5k045fpmq56.zip
If the ZIP contains an image or a document, it might be a Steganography challenge. : Use binwalk -e c5k045fpmq56