Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce78144fa261cc6…

MALICIOUS

PDF

15.1 KB Created: 2019-05-01 05:15:02 +01:00 Authoring application: mPDF 5.7
MD5: cfc287a08d4c420b2d6101bbb6d64204 SHA-1: 02a4eca6e263c9a8450de7e97f4892e6a90128ab SHA-256: 8ce78144fa261cc614fff8f8071b1d94566384a7a55c78e831b01ec4ff934596
90 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links point to benign-looking book titles, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, likely to manipulate search engine results or redirect users to harmful sites. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/4a08a00a04a01a08/Rhinos-for-Lunch-and-Elephants-for-Supper-by-Tololwa-M-Mollel.pdf
    • http://muicuiu.dumb1.com/5a08a03a07a02/Lunch-Lady-and-the-Author-Visit-Vendetta-Lunch-Lady-3-by-Jarrett-J-Krosoczka.pdf
    • http://muicuiu.dumb1.com/3a07a02a01a03a06/Lunch-Lady-and-the-Picture-Day-Peril-Lunch-Lady-8-by-Jarrett-J-Krosoczka.pdf
    • http://muicuiu.dumb1.com/1a00a09a07a03a09a01/The-Last-Supper-by-Pawe-Huelle.pdf
    • http://muicuiu.dumb1.com/1a00a04a09a07a05/The-Laugh-Supper-by-Leonard-Ryzman.pdf
    • http://muicuiu.dumb1.com/3a08a08a09a04a04/The-Secret-Supper-by-Javier-Sierra.pdf
    • http://muicuiu.dumb1.com/1a00a04a08a07a01/The-Last-Supper-Paul-Christopher-5-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/4a08a06a05a07a05/The-Last-Supper-A-Summer-in-Italy-by-Rachel-Cusk.pdf
    • http://muicuiu.dumb1.com/1a01a03a00a07a08a01/The-Lord-s-Supper-De-Coena-Domini-by-Martin-Chemnitz.pdf
    • http://muicuiu.dumb1.com/4a05a01a08a07a01/Before-Lunch-by-Angela-Thirkell.pdf
    • http://muicuiu.dumb1.com/3a01a02a09a01a03/Lunch-by-Denise-Fleming.pdf
    • http://muicuiu.dumb1.com/4a03a03a04a02a07/Lunch-with-Sam-by-Phil-Wohl.pdf
    • http://muicuiu.dumb1.com/3a06a06a03a09a05/Lunch-by-William-A-B-Smith.pdf
    • http://muicuiu.dumb1.com/1a01a04a01a00a03a06/Black-Beans-amp-Vice-A-Supper-Club-Mystery-6-by-J-B-Stanley.pdf
    • http://muicuiu.dumb1.com/1a01a03a00a07a08a07/The-Lord-s-Supper-in-the-Theology-of-Martin-Chemnitz-by-Bjarne-W-Teigen.pdf
    • http://muicuiu.dumb1.com/3a05a00a07a04a02/The-Girls-Guide-to-Love-and-Supper-Clubs-by-Dana-Bate.pdf
    • http://muicuiu.dumb1.com/1a01a03a00a08a05a02/The-Lord-s-Supper-In-The-Theology-Of-Martin-Chemnitz-by-Bjarne-W-Teigen.pdf
    • http://muicuiu.dumb1.com/4a02a09a00a03a09/The-Supper-of-the-Lamb-A-Culinary-Reflection-by-Robert-Farrar-Capon.pdf
    • http://muicuiu.dumb1.com/3a09a09a01a09/You-Can-t-See-the-Elephants-by-Susan-Kreller.pdf
    • http://muicuiu.dumb1.com/9a01a05a04a06a00/Don-t-Tease-the-Elephants-by-Jen-Knox.pdf
    • http://muicuiu.dumb1.com/3a01a02a09a01a03/L

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