: If the download has no extension (e.g., .pdf , .zip , .exe ), be extremely cautious.
: On Windows or Mac, right-click the file to see its properties. Sometimes the "Type" or "Origin" metadata will reveal the actual file format. Download File 594bdfbf-d90c-419e-8a6c-68bdffdff...
Did this file download , or did it appear after you performed a specific action on a website? : If the download has no extension (e
If you must know what it is, you can check the file type safely: Did this file download , or did it
: If this file appeared as an unsolicited email attachment or an automatic "drive-by" download while browsing an unfamiliar site, do not open it . How to investigate further
: Sometimes, a browser fails to read the Content-Disposition header from a website. This header normally tells the browser, "Call this file 'Invoice.pdf'"; if it fails, the browser defaults to the raw ID used by the server. Is it safe to open?