Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc6800ab4c2710d…

MALICIOUS

PDF

12.7 KB Created: 2019-05-07 03:19:02 +01:00 Authoring application: mPDF 5.7
MD5: cd514fc4cff04e8a1ef3b8b3c84481e0 SHA-1: 3eda7e22d3db0103d850a329416d7d64b498b097 SHA-256: cdc6800ab4c2710dc6823a66be820fc9bf8dba4fe17b8079fee0bcf980fef9ca
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to distribute further malicious content. The ML classifier also flagged this document as malicious. While the specific intent of the linked PDFs is unclear, the sheer volume and the heuristic firing suggest a malicious distribution or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://muicuiu.dumb1.com/3a07a00a03a09a00/The-Red-Necklace-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/6a02a04a08a03/Maggot-Moon-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/4a05a04a07a02a00/Operation-Bunny-Wings-amp-Co-1-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/1a00a03a05a06a01a04/Finding-Cordelia-by-Sally-Patricia-Gardner.pdf
    • http://muicuiu.dumb1.com/1a06a04a03a07a07/The-Countess-s-Calamity-Tales-from-the-Box-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/3a02a01a04a00/The-Red-Necklace-French-Revolution-1-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/1a04a02a02a06a06/The-Silver-Blade-French-Revolution-2-by-Sally-Gardner.pdf
    • http://muicuiu.dumb1.com/8a05a08a06a07a02/The-Lazarus-Door-Who-would-choose-a-door-over-a-man-like-him-by-S-E-Lentz.pdf
    • http://muicuiu.dumb1.com/8a01a06a03a03a09/Door-to-Door-by-Mariam-Razek.pdf
    • http://muicuiu.dumb1.com/2a01a09a08a07a07/Demon-at-My-Door-Demon-at-My-Door-1-by-Michelle-A-Valentine.pdf
    • http://muicuiu.dumb1.com/6a01a06a05a06a04/No-Deals-Mr-Bond-John-Gardner-s-Bond-6-by-John-Gardner.pdf
    • http://muicuiu.dumb1.com/2a02a06a04a03a04/The-Black-Door-The-Black-Door-1-by-Velvet.pdf
    • http://muicuiu.dumb1.com/5a08a04a09a08a09/Like-a-Dog-by-Zak-Sally.pdf
    • http://muicuiu.dumb1.com/3a04a02a00a07a03/Ice-by-Lyn-Gardner.pdf
    • http://muicuiu.dumb1.com/3a05a04a08a07a04/Ice-by-Lyn-Gardner.pdf
    • http://muicuiu.dumb1.com/3a04a00a09a07a02/Kept-by-Sally-Bradley.pdf
    • http://muicuiu.dumb1.com/9a06a04a03a04a05/T-r-an-T-r-by-Darlene-Gardner.pdf
    • http://muicuiu.dumb1.com/6a07a09a02a00a02/The-Catacombs-by-A-J-Gardner.pdf
    • http://muicuiu.dumb1.com/2a07a02a04a05a05/Rip-Off-by-Gardner-Dozois.pdf
    • http://muicuiu.dumb1.com/2a06a02a02a01a05/My-Place-by-Sally-Morgan.pdf
    • http://muicuiu.dumb1.com/5a0

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