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)