The short answer is: While hackers can mask malware as media files, this specific naming pattern is highly characteristic of legitimate Facebook traffic. However, if you do not use Facebook Messenger or have no memory of a recent video exchange, you should treat any unknown file with caution. What should you do?
The filename format Received_[NumericID].mp4 is the standard naming convention used by when saving a video to your device. Received 1060049901243273 mp4
The long string of numbers (1060049901243273) is a unique identifier assigned by Facebook's CDN (Content Delivery Network). The short answer is: While hackers can mask
Search your recent chats for a video. If the ID matches a video you recognize from a friend, it’s safe. The filename format Received_[NumericID]
To prevent this in the future, go to Messenger > Settings > Photos & Media and toggle off Save on Capture or Save Photos and Videos .