BSides Tallinn 2025

Examining document file structure.
2025-09-25 , Workshops

Short overview off file analysis
Brief deep dives into:
PDF Format
Office formats (DOCX, XLSX...DOC,XLS..)
Image formats (JPEG, PNG)
MP3/MP4
Archives (ZIP, RAR, 7z...)
Each topic we look at
* Headers and structure basics
* How file structure had ben used in attacks.
Detection artifacts in file format with Hands-on file Dissection with using tools like:
binwalk
xxd / hexdump
ExifTool
oletools , pefile ,PDFid ,PDF-Parser and so on.
Task to understand structure and identify potently malicious components


Workshop extra info:

To get the most out of the workshop, participants need to bring their own laptops with the ability to install additional software (including virtual machines). We can accommodate a maximum of about 26 people for the lab session

well seasoned Cyber Security Analyst with over 20+ years of experience in the IT industry.
Specialises in network forensics, malware analysis and in incident handling.
Work blends hands-on technical analysis with emphasis on critical thinking and laziness being also passionate about secure software practices. Likes to pet dogs and other domestic animals.