Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b37421500534cf…

MALICIOUS

PDF

16.4 KB Created: 2019-05-02 01:40:11 +01:00 Authoring application: mPDF 5.7
MD5: 798437f26f6d376e792a41ccc8e352d9 SHA-1: 59ee82d0c01cf8a0d5d72ffb515d6385d64ebbf8 SHA-256: 34b37421500534cf0758e5f3ea0cff9816fab1b363aa23bde15acc79c61fbc47
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier also flagged this sample as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/4a03a09a02a06a01/Re-Vamped-My-Sister-the-Vampire-3-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/1a00a02a02a08a01/Re-Vamped-My-Sister-the-Vampire-Series-3-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/2a09a05a06a02a06/Take-Two-My-Sister-the-Vampire-5-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a06a07a06a05a06/Stake-Out-My-Sister-The-Vampire-12-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/2a00a03a08a00a08/Bite-Night-My-Sister-the-Vampire-10-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a07a04a00a07a03/Flying-Solo-My-Sister-the-Vampire-11-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a07a04a00a07a04/My-Sister-The-Vampire-Collection-Take-Two-Vampalicious-Revamped-Fangtastic-Switched-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a05a02a08a09a04/Tail-Spin-My-Brother-the-Werewolf-4-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a05a00a00a01a05/Puppy-Love-My-Brother-the-Werewolf-2-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/1a00a07a01a00a05a05/Karen-s-Big-Sister-Baby-Sitters-Little-Sister-69-by-Ann-M-Martin.pdf
    • http://muicuiu.dumb1.com/4a09a09a01a00a03/Karen-s-Little-Sister-Baby-Sitters-Little-Sister-6-by-Ann-M-Martin.pdf
    • http://muicuiu.dumb1.com/1a00a07a08a00a09a00/Sister-Sister-by-Eric-Jerome-Dickey.pdf
    • http://muicuiu.dumb1.com/4a04a01a09a00a02/Shout-Sister-Shout-The-Untold-Story-of-Rock-and-Roll-Trailblazer-Sister-Rosetta-Tharpe-by-Gayle-Wald.pdf
    • http://muicuiu.dumb1.com/8a05a07a06a02/Sister-Pelagia-and-the-White-Bulldog-Sister-Pelagia-Mysteries-1-by-Boris-Akunin.pdf
    • http://muicuiu.dumb1.com/1a00a07a09a07a03a07/Oz-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/1a08a06a02a09a02/The-Oaf-Prince-by-Sienna-Sway.pdf
    • http://muicuiu.dumb1.com/1a02a09a09a00a00/Before-Sunrise-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/2a05a00a06a06a03/The-Accidental-Mistress-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/2a04a09a01a08a04/Taming-the-Scotsman-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/3a06a00a07a00a05/Burnt-Sienna-by-David-Morrell.pdf
    • http://muicuiu.dumb1.com/4a09a09a01a00a03/Karen-

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