Malicious PDF — malware analysis report

Static analysis result for SHA-256 655fac5325fd1b1b…

MALICIOUS

PDF

19.8 KB Created: 2019-04-30 05:45:53 +01:00 Authoring application: mPDF 5.7
MD5: 8156069206be8d26331cb1ecf6808126 SHA-1: 07f819005b52b19ee0b7f5d3aa917bf8fd7d3a46 SHA-256: 655fac5325fd1b1b82c056628f270860ebb051235f711da6e489b37aba4aa64a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with numerous URLs pointing to other PDF documents. This is indicative of a SEO manipulation or link farm attack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content, possibly disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/4a00a00a09a07a09/The-Great-Democracies-A-History-of-the-English-Speaking-Peoples-4-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/8a09a08a01a02/The-New-World-A-History-of-the-English-Speaking-Peoples-2-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/8a09a05a01a03/The-Birth-of-Britain-A-History-of-the-English-Speaking-Peoples-1-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/4a00a00a09a01a02/The-Birth-of-Britain-A-History-of-the-English-Speaking-Peoples-1-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/5a00a05a00a03a07/Speaking-For-Themselves-The-Private-Letters-Of-Sir-Winston-And-Lady-Churchill-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/7a09a00a09a09a08/Winston-Churchill-The-Incredible-Life-And-Legacy-Of-Winston-Churchill-by-Tom-King.pdf
    • http://muicuiu.dumb1.com/7a09a00a09a09a04/Churchill-s-Triumph-Winston-Churchill-4-by-Michael-Dobbs.pdf
    • http://muicuiu.dumb1.com/7a09a01a00a00a00/Churchill-s-Hour-Winston-Churchill-3-by-Michael-Dobbs.pdf
    • http://muicuiu.dumb1.com/9a03a07a04a05a04/The-Great-Shame-And-the-Triumph-of-the-Irish-in-the-English-Speaking-World-by-Thomas-Keneally.pdf
    • http://muicuiu.dumb1.com/4a07a05a00a03a01/The-New-World-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/1a05a00a04a00a03/The-Crossing-by-Winston-Churchill.pdf
    • http://muicuiu.dumb1.com/4a06a04a08a09a06/Songs-Upon-the-Rivers-The-Buried-History-of-the-French-Speaking-Canadiens-and-M-tis-from-the-Great-Lakes-and-the-Mississippi-across-to-the-Pacific-by-Michel-Bouchard.pdf
    • http://muicuiu.dumb1.com/3a02a04a02a07a07/The-Second-World-War-6-volumes-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/1a04a03a06a05a02/Winston-Churchill-by-John-Keegan.pdf
    • http://muicuiu.dumb1.com/4a00a06a07a01/Memoirs-of-the-Second-World-War-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/1a03a09a07a09a05/The-Gathering-Storm-The-Second-World-War-1-by-Winston-S-Churchill.pdf
    • http://muicuiu.dumb1.com/7a09a00a09a06a05/The-Wit-amp-Wisdom-of-Winston-Churchill-by-James-C-Humes.pdf
    • http://muicuiu.dumb1.com/4a02a01a04a06a03/Winston-Churchill-Man-of-the-Century-by-John-Ramsden.pdf
    • http://muicuiu.dumb1.com/7a04a08a05a05a07/Winston-s-War-Churchill-1940-1945-by-Max-Hastings.pdf
    • http://muicuiu.dumb1.com/1a00a02a01a04a09a03/The-World-Crisis-1911-1918-by-Winston-S-Churchill.pdf

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