Malicious PDF — malware analysis report

Static analysis result for SHA-256 f520bc778e4bc5b8…

MALICIOUS

PDF

21.3 KB Created: 2019-05-02 11:40:49 +01:00 Authoring application: mPDF 5.7
MD5: 6a3ca5561c14d633bc002961300e4ac3 SHA-1: 5d14001f52dae6e5b3e4e6a9d032374538372340 SHA-256: f520bc778e4bc5b85fbd8656c1d949844d9e760088aed84d33b226bbd77df7ca
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, a technique often used for SEO manipulation or to host malicious content. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent, possibly to redirect users to harmful sites or to serve as a lure.

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.co
    • http://muicuiu.dumb1.com/5a01a06a06a07a06/Reflections-Of-A-Siamese-Twin-Canada-At-The-End-Of-The-Twentieth-Century-by-John-Ralston-Saul.pdf
    • http://muicuiu.dumb1.com/1a06a01a07a05a07/The-Comeback-by-John-Ralston-Saul.pdf
    • http://muicuiu.dumb1.com/4a04a06a01a07a03/Unconscious-Civilization-by-John-Ralston-Saul.pdf
    • http://muicuiu.dumb1.com/1a03a02a09a00a03/Reappraisals-Reflections-on-the-Forgotten-Twentieth-Century-by-Tony-Judt.pdf
    • http://muicuiu.dumb1.com/1a03a06a03a07a06/States-of-Nature-Conserving-Canada-s-Wildlife-in-the-Twentieth-Century-by-Tina-Loo.pdf
    • http://muicuiu.dumb1.com/3a09a00a02a04a07/The-Broadview-Anthology-of-British-Literature-Volume-6a-The-Twentieth-Century-and-Beyond-From-1900-to-Mid-Century-Volume-6a-The-Twentieth-Century-and-Beyond-From-1900-to-Mid-Century-by-Joseph-Laurence-Black.pdf
    • http://muicuiu.dumb1.com/3a08a05a06a08a09/The-Oxford-History-of-the-British-Empire-Volume-IV-The-Twentieth-Century-Twentieth-Century-Vol-4-by-Judith-M-Brown.pdf
    • http://muicuiu.dumb1.com/7a06a03a02a08a03/Somozas-and-Sandinistas-The-U-S-and-Nicaragua-in-the-Twentieth-Century-by-John-Tierney.pdf
    • http://muicuiu.dumb1.com/2a09a08a03a01a02/Pure-Pleasure-A-Guide-to-the-Twentieth-Century-s-Most-Enjoyable-Books-by-John-Carey.pdf
    • http://muicuiu.dumb1.com/4a00a00a00a02a05/Queer-Noises-Male-and-Female-Homosexuality-in-Twentieth-Century-Music-by-John-Gill.pdf
    • http://muicuiu.dumb1.com/1a04a02a00a08a07/A-Clashing-of-the-Soul-John-Hope-and-the-Dilemma-of-African-American-Leadership-and-Black-Higher-Education-in-the-Early-Twentieth-Century-by-Leroy-Davis.pdf
    • http://muicuiu.dumb1.com/2a07a02a01a05a07/Thinking-the-Twentieth-Century-by-Tony-Judt.pdf
    • http://muicuiu.dumb1.com/3a03a02a09a07a07/My-Twentieth-Century-Poems-by-David-K-Kirby.pdf
    • http://muicuiu.dumb1.com/2a08a00a09a01/American-Law-in-the-Twentieth-Century-by-Lawrence-M-Friedman.pdf
    • http://muicuiu.dumb1.com/9a02a03a05a05/In-Europe-Travels-Through-the-Twentieth-Century-by-Geert-Mak.pdf
    • http://muicuiu.dumb1.com/2a09a00a05a03a05/Paris-in-the-Twentieth-Century-by-Jules-Verne.pdf
    • http://muicuiu.dumb1.com/4a05a02a04a09a07/The-Myth-of-the-Twentieth-Century-by-Alfred-Rosenberg.pdf
    • http://muicuiu.dumb1.com/5a01a08a03a01a02/Alabama-in-the-Twentieth-Century-by-Wayne-Flynt.pdf
    • http://muicuiu.dumb1.com/4a03a02a02a04a08/A-War-of-Nerves-Soldiers-and-Psychiatrists-in-the-Twentieth-Century-by-Ben-Shephard.pdf
    • http://muicuiu.dumb1.com/5a07a01a03a04a01/The-Twentieth-Century-A-World-History-by-Clive-Ponting.pdf

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