Malicious PDF — malware analysis report

Static analysis result for SHA-256 caac3fdd88ef12de…

MALICIOUS

PDF

17.1 KB Created: 2019-05-05 16:58:03 +01:00 Authoring application: mPDF 5.7
MD5: 2f3ccffe19dcad74af5f7069143c41a5 SHA-1: 6d1b876b5c135d1d79f0f7811957af1c69061c1b SHA-256: caac3fdd88ef12de2f116aa81666a512a322a820caff607d3b9fb961715fe211
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier with high confidence and also triggered a critical heuristic for hosting a large number of external links. The document body contains numerous URLs pointing to what appears to be a link farm, likely intended for SEO manipulation or to redirect users to malicious sites. No scripts were extracted from this sample.

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.dumb1.com/3a03a08a03a08/Walden-amp-Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a01a07a07a09a02a08/Walden-and-Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a00a01a01a06a00a09/The-Best-of-Walden-and-Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a01a05a09a00a02/Walden-Ou-la-vie-dans-les-bois-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a03a06a03a04a06/Thoughts-from-Walden-Pond-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/3a03a08a00a04a03/Walden-and-Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a06a00a00a03a06/Walden-Or-Life-in-the-Woods-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/7a02a03a06a03a07/Walden-oder-Leben-in-den-W-ldern-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a07a00a09a06a07/Walden-oder-Leben-in-den-W-ldern-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/7a05a05a06a05a07/Walden---Return-to-Nature-An-American-Classic-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a07a09a08a06a04/Walden-Black-Illustrated-Classics-Bonus-Free-Audiobook-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a06a03a08a03a06/Walden-oder-Leben-in-den-W-ldern-Eine-illustrierte-und-vollst-ndig-neu-berarbeitete-Ausgabe-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a04a04a05a01a05/Walden-In-Plain-and-Simple-English-Includes-Study-Guide-Complete-Unabridged-Book-Historical-Context-Biography-and-Character-Index-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a09a04a04a06a04/Wild-Fruits-Thoreau-s-Rediscovered-Last-Manuscript-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a02a01a03a02a04/Thoreau-on-Wolf-Hill-Henry-David-Thoreau-Mystery-2-by-B-B-Oak.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a06a04/A-Year-in-Thoreau-s-Journal-1851-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a04a08/The-Quotable-Thoreau-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a07a01/The-Wisdom-Of-Thoreau-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a03a07a02a05/Walking-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/9a09a03a08a06/Walking-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a07a09a08a

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