: Run the file through VirusTotal to check it against dozens of antivirus engines simultaneously.
: Only open the file if you recognize the sender or the website where you downloaded it. Compressed files like .rar are frequently used to hide malicious executables or scripts. tarea 1245.rar
: If the file is unexpectedly small (a few KBs) or very large for "homework," it may be a placeholder or a bundle of unwanted software. : Run the file through VirusTotal to check