File signatures

File Extension File Description HEX signature Offset File Trailer
JPEG Generic JPEG image file FF D8 FF FF D9
GIF87a Graphics interchange format file 47 49 46 38 37 61 00 3B
GIF89a Graphics interchange format file 47 49 46 38 39 61 00 3B
BMP Microsoft bitmap image 42 4D
PNG Portable Network Graphics file 89 50 4E 47 0D 0A 1A 0A
PST Personal Storage Table, Microsoft Outlook 21 42 44 4E
DOCX Microsoft Office Word Document 50 4B 03 04 14 00 06 00 50 4B 05 06
PPTX Microsoft Office PowerPoint Document 50 4B 03 04 14 00 06 00 50 4B 05 06
XLSX Microsoft Office Excel Document 50 4B 03 04 14 00 06 00 50 4B 05 06
PDF Adobe Portable Document Format 25 50 44 46 0A 25 25 45 4F 46
ZIP Archive file 50 4B 03 04
RTF Rich text format 7B 5C 72 74 66 7D