Weird files

• Shattered: reusable 🖼️PDF(JPG) identical prefix SHA1 collision.
• Pile-Up: reusable 🖼️PE/PNG/PDF/MP4 chosen prefix MD5 multi-collision.
• Universal Doom by Robert Xiao: 🖼️a functional DOS Executable (Dos4/GW) and Portable Executable polyglot.
• 🖼️A polymock header: a file with many mock formats signatures.
• PNG Zip twist by Gynvael Coldwind: 🖼️A ZIP/PNG polyglot (sharing the deflate data).

Janus

by xcellerator: a 512 bytes COM/MBR/PRG/Multiboot/Rar/ZIP/ELF polyglot .

Illustrations for the PoC||GTFO 0x22:11 article.

• 🖼️Overview map
• 🖼️Complete dissection

Detailed file types:

• 🖼️GNU Multiboot2
• 🖼️Rar/Zip
• 🖼️Commodore 64 program (C64 PRG)
• 🖼️Dos Command (Com) / Master Boot record (mbr)
• 🖼️Executable and Linkable Format (Elf)