Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cfd685426dc949…

MALICIOUS

PDF

24.9 KB Created: 2019-04-30 02:24:53 +01:00 Authoring application: mPDF 5.7
MD5: 44a3f49abbf71b0794b872dbb9d948c3 SHA-1: c03a6f50e3bca96684fe09ab5b25b2f9cf73b1f3 SHA-256: e3cfd685426dc9494f6dd107deb1d339b6632e49c7e2b57a972a7910628cdf6f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. While many of these links resolve to benign-looking book titles, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, likely to lure users to malicious sites through SEO poisoning or by disguising malicious links as legitimate content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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/8a02a05a08a05a01/The-Journals-of-Lewis-amp-Clark-1804-1806-Meriwether-Lewis-1774-1809-amp-William-Clark-1770-1838-by-Meriwether-Lewis.pdf
    • http://muicuiu.dumb1.com/4a03a06a04a06a08/The-Journals-of-Lewis-and-Clark-by-Meriwether-Lewis.pdf
    • http://muicuiu.dumb1.com/3a07a01a03a04a09/The-Suppressed-History-of-America-the-Murder-of-Meriwether-Lewis-and-the-Mysterious-Discoveries-of-the-Lewis-and-Clark-Expedition-by-Paul-Schrag.pdf
    • http://muicuiu.dumb1.com/7a06a05a08a03a04/Lewis-and-Clark-Trail-Maps-Missouri-River-Between-Camp-River-DuBois-Illinois-and-Fort-Mandan-North-Dakota--Outbound-1804-Return-1806-by-Martin-Plamondon.pdf
    • http://muicuiu.dumb1.com/2a06a08a01a05a02/Undaunted-Courage-Meriwether-Lewis-Thomas-Jefferson-and-the-Opening-of-the-American-West-by-Stephen-E-Ambrose.pdf
    • http://muicuiu.dumb1.com/2a04a04a06a03a03/Lewis-amp-Clark-And-Me-by-Spence-Campbell.pdf
    • http://muicuiu.dumb1.com/3a09a08a06a08a05/The-Adventures-of-Lewis-and-Clark-by-John-Bakeless.pdf
    • http://muicuiu.dumb1.com/4a02a01a00a09a02/In-the-Footsteps-of-Lewis-and-Clark-by-Gerald-S-Snyder.pdf
    • http://muicuiu.dumb1.com/2a01a01a02a05a03/Lewis-and-Clark-Across-the-Divide-by-Carolyn-Ives-Gilman.pdf
    • http://muicuiu.dumb1.com/4a03a08a02a09a08/Lewis-and-Clark-Trail-The-Then-and-Now-Then-and-Now-by-Dorothy-Hinshaw-Patent.pdf
    • http://muicuiu.dumb1.com/2a09a03a03a08/I-Should-Be-Extremely-Happy-in-Your-Company-A-Novel-of-Lewis-and-Clark-by-Brian-Hall.pdf
    • http://muicuiu.dumb1.com/1a01a02a04a04a07/The-Captain-s-Dog-My-Journey-with-the-Lewis-and-Clark-Tribe-by-Roland-Smith.pdf
    • http://muicuiu.dumb1.com/2a01a01a02a05a05/The-Story-of-Sacajawea-Guide-to-Lewis-and-Clark-by-Della-Rowland.pdf
    • http://muicuiu.dumb1.com/7a06a05a08a07a02/Lewis-and-Clark-Trail-Maps-VII-A-Cartographic-Reconstruction-by-Martin-Plamondon.pdf
    • http://muicuiu.dumb1.com/7a06a06a00a06a01/Lewis-And-Clark-Trail-Maps-A-Cartographic-Reconstruction-Volume-Iii-by-Martin-Plamondon-II.pdf
    • http://muicuiu.dumb1.com/7a00a03a07a03a07/Eat-Your-Way-West-with-Lewis-and-Clark-And-the-Many-Food-History-Lovers-at-the-End-of-the-Oregon-Trail-by-Melanie-Lessard.pdf
    • http://muicuiu.dumb1.com/3a07a00a07a03a02/Mountain-Man-John-Colter-the-Lewis-Clark-Expedition-and-the-Call-of-the-American-West-by-David-Marshall.pdf
    • http://muicuiu.dumb1.com/8a08a03a03a08a02/The-Collected-Letters-of-C-S-Lewis-Volume-3-Narnia-Cambridge-and-Joy-1950---1963-by-C-S-Lewis.pdf
    • http://muicuiu.dumb1.com/2a06a01a02a03a02/The-Complete-C-S-Lewis-Signature-Classics-by-C-S-Lewis.pdf
    • http://muicuiu.dumb1.com/1a00a02a02a08a08a01/A-Mind-Awake-An-Anthology-of-C-S-Lewis-by-C-S-Lewis.pdf