Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7cd44480da7dd4…

MALICIOUS

PDF

16.7 KB Created: 2019-04-30 02:30:00 +01:00 Authoring application: mPDF 5.7
MD5: 96f427fa4dd3e256e2f5dce5f4de7a46 SHA-1: 6a3852d1c63a69bd2eb99cccc1c3e19d4a8c0e76 SHA-256: 8a7cd44480da7dd473562e5408e89d8fcbb7e42e5c4f7189d1afbaf095fa1794
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which suggests a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness. While the URLs themselves are currently flagged as benign, the sheer volume and structure point towards a malicious intent, likely to drive traffic or distribute further malware. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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.dumb
    • http://muicuiu.dumb1.com/2a01a08a05a06a02/Emperor-and-Clown-A-Man-of-His-Word-4-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a08a09a09a03a08/Faery-Lands-Forlorn-A-Man-of-His-Word-2-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/2a04a03a06a07a02/Against-the-Light-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a04a06a09a09a08/Against-the-Light-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/2a08a07a05a09a07/Silvercloak-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a04a07a02a02a09/Pock-s-World-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a00a08a07a03a06/A-Rose-Red-City-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/1a04a08a06a05a01/King-of-Swords-The-Starfolk-1-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/1a07a02a08a03a04/The-Reaver-Road-Omar-1-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a03a08a05a08a00/Portal-of-a-Thousand-Worlds-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/1a04a08a07a01a08/Children-of-Chaos-Dodec-1-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/4a07a01a08a00a07/The-Reluctant-Swordsman-The-Seventh-Sword-1-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/3a04a07a02a02a06/The-Death-of-Nnanji-The-Seventh-Sword-4-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/4a00a00a01a03a00/Chipper-the-Clown-A-Kids-Book-about-a-Circus-Clown-Who-Learns-That-It-S-Important-to-Ask-for-Help-in-Order-to-Follow-Your-Dreams-by-Don-M-Winn.pdf
    • http://muicuiu.dumb1.com/3a02a05a02a09a07/Lord-of-the-Fire-Lands-The-King-s-Blades-2-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/2a07a06a05a05a05/The-Destiny-of-the-Sword-The-Seventh-Sword-3-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/2a08a07a05a09a05/The-Alchemist-s-Code-The-Alchemist-2-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/2a09a05a09a05a04/The-Great-Game-Past-Imperative-Present-Tense-Future-Indefinite-The-Great-Game-1-3-by-Dave-Duncan.pdf
    • http://muicuiu.dumb1.com/6a08a08a04a08a02/The-Last-Fancy-Dan-The-Duncan-Mc-Kenzie-Story-by-Duncan-McKenzie.pdf
    • http://muicuiu.dumb1.com/8a00a07a05a02a02/The-Word-Militant-Preaching-a-Decentering-Word-by-Walter-Brueggemann.pdf

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