Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c76751883b01e5…

MALICIOUS

PDF

17.1 KB Created: 2019-05-02 01:04:01 +01:00 Authoring application: mPDF 5.7
MD5: 7cc3f2a29d7c969c843b2eadc4cad902 SHA-1: e55193fbf41e5d6c7989a32cfa353b0391ae4764 SHA-256: f1c76751883b01e577125833504b32a370e99ac5b3722e0a6c8f29e8c4abdb7f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, identified by the PDF_SEO_LINK_FARM heuristic. While the specific content of these linked PDFs is benign, the sheer volume and structure suggest a link farm or SEO spamming operation. The ML classifier also flagged this PDF as malicious. 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
    • http://muicuiu.dumb1.com/3a07a04a06a03/My-Best-Friend-s-Brother-by-M-J-Thompson.pdf
    • http://muicuiu.dumb1.com/2a09a07a02a06a01/The-Friend-Zone-Chloe-and-Skye-The-Friend-Zone-1-by-Tabetha-Thompson.pdf
    • http://muicuiu.dumb1.com/1a09a02a05a09a00/My-Best-Friend-s-Brother-by-C-R-Guiliano.pdf
    • http://muicuiu.dumb1.com/3a04a05a07a02a08/My-Brother-s-Best-Friend-by-knightsrachel.pdf
    • http://muicuiu.dumb1.com/5a09a02a08a01a01/Knocked-Up-by-Brother-s-Best-Friend-by-Amy-Brent.pdf
    • http://muicuiu.dumb1.com/1a06a06a06a07a03/Finding-Troy-My-Best-Friend-s-Brother-3-by-Chrissy-Favreau.pdf
    • http://muicuiu.dumb1.com/2a07a02a08a03a07/My-Best-Friend-s-Brother-Bashir-Family-1-by-Kennedy-Claire.pdf
    • http://muicuiu.dumb1.com/3a05a09/Falling-for-My-Best-Friend-s-Brother-One-Night-Stand-2-by-J-S-Cooper.pdf
    • http://muicuiu.dumb1.com/1a05a06a08a09a03/Brother-Bewildered-Sequel-to-the-Smash-Epic-Fantasy-Brother-Bewitched-The-Shattered-Isles-Book-2-by-Taylor-Galen-Kadee.pdf
    • http://muicuiu.dumb1.com/3a07a01a00a04a04/Brother-Against-Brother-by-Time-Life-Books.pdf
    • http://muicuiu.dumb1.com/1a00a07a01a00a00a07/Friend-Against-Friend-Sweet-Valley-High-69-by-Francine-Pascal.pdf
    • http://muicuiu.dumb1.com/3a06a09a07a07a07/Any-Friend-of-God-s-is-a-Friend-of-Mine-A-Biblical-amp-Historical-Exploration-of-the-Catholic-Doctrine-of-the-Communion-of-Saints-by-Patrick-Madrid.pdf
    • http://muicuiu.dumb1.com/2a03a07a09a04a07/How-to-Be-a-Friend-to-a-Friend-Who-s-Sick-by-Letty-Cottin-Pogrebin.pdf
    • http://muicuiu.dumb1.com/4a00a05a09a05a06/Little-Brother-Little-Brother-1-by-Cory-Doctorow.pdf
    • http://muicuiu.dumb1.com/1a05a00a00a02a02/Brother-Cadfael-s-Penance-Chronicles-of-Brother-Cadfael-20-by-Ellis-Peters.pdf
    • http://muicuiu.dumb1.com/1a01a04a07a03a02a05/Thompson-amp-Thompson-Genetics-in-Medicine-by-Robert-Nussbaum.pdf
    • http://muicuiu.dumb1.com/1a01a04a07a04a04a05/Thompson-amp-Thompson-Genetics-in-Medicine-by-Robert-L-Nussbaum.pdf
    • http://muicuiu.dumb1.com/1a06a03a08a07a08/The-Initiate-Brother-Initiate-Brother-1-by-Sean-Russell.pdf
    • http://muicuiu.dumb1.com/2a01a02a00a03a03/Friend-Zoned-Friend-Zoned-1-by-Belle-Aurora.pdf
    • http://muicuiu.dumb1.com/4a04a02a02a06a09/The-Supermodel-s-Best-Friend-The-Supermodel-s-Best-Friend-1-by-Gretchen-Galway.pdf

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