The "Pj" in the filename often hints at a or a specific hex signature error. MP4 files require a specific structure (atoms like ftyp , moov , and mdat ) to play.
Extract frames as images and use StegSolve to check different color planes (Alpha, Red, etc.). 3. File Carving (The "Sape" Hint)
Check the hex data after the free or moov atom. Often, flags are appended as plain text at the very bottom of the file. To provide a more specific write-up, could you share: Pjmp4_at_Sape_mp4
The file won't open because the header (the first few bytes) is corrupted or overwritten with junk data.
What happens when you try to in a terminal? Does the video actually play , or is it "broken"? The "Pj" in the filename often hints at
Use Binwalk ( binwalk -e Pjmp4_at_Sape_mp4 ) to see if there is a hidden ZIP or JPEG appended to the end of the MP4 data.
Which or event this is from (e.g., HTB, TryHackMe, PicoCTF)? To provide a more specific write-up, could you
"Sape" might refer to a specific offset or a misspelled "Shape."