Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dba133b2ff586f5…

MALICIOUS

PDF

27.7 KB Created: 2019-04-30 04:57:43 +01:00 Authoring application: mPDF 5.7
MD5: 0d57f17ef122848f16cfd486ef5b9141 SHA-1: c684dff09c589a1a5554152a62eb41fc6951974f SHA-256: 9dba133b2ff586f5dc700264dc376e97e5f5bd85b1c6bf92b3651e9a32d39a6a
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. While many of these links point to what appear to be legitimate book titles, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, possibly for SEO spam or to mask malicious redirects. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

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/1a01a09a06a07a01a06/First-Aid-for-the-Basic-Sciences-Organ-Systems-by-Tao-T-Le.pdf
    • http://muicuiu.dumb1.com/3a08a06a01a09a03/Methodology-for-the-Human-Sciences-Systems-of-Inquiry-by-Donald-E-Polkinghorne.pdf
    • http://muicuiu.dumb1.com/1a00a03a08a09a00a02/Hematopoietic-Stem-Cells-2000-Basic-and-Clinical-Sciences-Third-International-Conference-by-Donald-Orlic.pdf
    • http://muicuiu.dumb1.com/1a01a08a08a04a07a06/BARENREITER-LUBECK-VINCENT---NEW-EDITION-OF-THE-COMPLETE-ORGAN-AND-KEYBOARD-WORKS-VOL-1---ORGAN-HARPSICHORD-Classical-sheets-Organ-by-Lubeck.pdf
    • http://muicuiu.dumb1.com/7a01a08a08a02a08/The-Basic-Art-of-Visiting-Capri-Italy-or-Capri-Diem-The-Basic-Art-of-Italian-Cooking-Book-2-by-Maria-Liberati.pdf
    • http://muicuiu.dumb1.com/5a07a04a03a00a03/Modeling-and-Managing-Interdependent-Complex-Systems-of-Systems-by-Yacov-Y-Haimes.pdf
    • http://muicuiu.dumb1.com/5a07a04a03a05a02/Electoral-Systems-and-Party-Systems-A-Study-of-Twenty-Seven-Democracies-1945-1990-by-Arend-Lijphart.pdf
    • http://muicuiu.dumb1.com/1a00a06a02a07a05a01/Acquisition-of-Major-Weapons-Systems-by-the-Department-of-Defense-and-S-454-the-Weapon-Systems-Acquisition-Reform-Act-of-2009-by-U-S-Congress.pdf
    • http://muicuiu.dumb1.com/7a09a09a04a08a01/Unifying-Themes-in-Complex-Systems-VII-Proceedings-of-the-Seventh-International-Conference-on-Complex-Systems-by-Ali-A-Minai.pdf
    • http://muicuiu.dumb1.com/7a09a09a04a08a06/Unifying-Themes-in-Complex-Systems-Vol-V-Proceedings-of-the-Fifth-International-Conference-on-Complex-Systems-by-Ali-A-Minai.pdf
    • http://muicuiu.dumb1.com/1a00a02a06a04a05a05/Basic-Cannabis-Cooking-Basic-Cooking-with-Cannabis-Book-1-by-Steven-Frobe.pdf
    • http://muicuiu.dumb1.com/9a05a06a08a07a03/Red-Blood-Cell-Substitutes-Basic-Principles-and-Clinical-Applications-Basic-Principles-and-Clinical-Applications-by-Alan-Rudolph.pdf
    • http://muicuiu.dumb1.com/7a01a06a06a02a07/Intelligent-Information-Systems-2001-Proceedings-of-the-International-Symposium-Intelligent-Information-Systems-X-June-18-22-2001-Zakopane-Poland-by-M-A-Kopotek.pdf
    • http://muicuiu.dumb1.com/1a01a09a06a06a02a01/The-Last-Day-by-Emily-Organ.pdf
    • http://muicuiu.dumb1.com/1a03a04a01a07a01/The-Organ-Broker-by-Stu-Strumwasser.pdf
    • http://muicuiu.dumb1.com/1a00a09a07a05a00a08/The-Outsider-by-Emily-Organ.pdf
    • http://muicuiu.dumb1.com/1a00a08a01a03a04a04/Complex-Systems-Design-amp-Management-Asia-Smart-Nations-Sustaining-and-Designing-Proceedings-of-the-Second-Asia-Pacific-Conference-on-Complex-Systems-Design-amp-Management-CSD-amp-M-Asia-2016-by-Michel-Alexandre-Cardin.pdf
    • http://muicuiu.dumb1.com/2a08a01a01a04a05/The-Organ-Grinders-by-Bill-Fitzhugh.pdf
    • http://muicuiu.dumb1.com/1a01a09a06a07a04a00/The-Organ-Builder-by-Robert-Cohen.pdf
    • http://muicuiu.dumb1.com/1a01a09a06a08a01a01/Organ-Transplants-by-Robert-Finn.pdf
    • http://muicuiu.dumb1.com/7a01a08a08a02a08/The-Ba

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