Challenges

Category Web Pwn Reverse Crypto Forensics Misc OSINT Stego Blockchain Hardware Mobile

Difficulty Beginner Easy Medium Hard Insane

CTFtime weight

–

Higher weight ≈ harder, more prestigious event.

Year

–

CTF

Country

Must have Source / Docker Writeup

Sort

Reset

Challenge	CTF	Weight	Category	Has
squ1rrel_o_tron #pdf-javascript #riscv #custom-instructions #tinyemu	squ1rrel 2026	32.47	Reverse	files wu 1
squ1rrel_o_tron_2 #pdf-javascript #custom-vm #algorithm-identification	squ1rrel 2026	32.47	Reverse	files wu 1
Ez_PDF #pdf-forensics #exif #pdf-javascript	TCP1P 2023	97.33	Forensics	files wu 1