Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce886aeb4b8c9e6…

MALICIOUS

PDF

15.3 KB Created: 2019-05-02 00:54:11 +01:00 Authoring application: mPDF 5.7
MD5: 7b906b4f2d89120ebbd9140e1ff78656 SHA-1: ac3ab22727a6f9e858f6c59622bef2ba413d5874 SHA-256: 7ce886aeb4b8c9e6d350ae4fb0576f3dfe3f338b24cdac4e2c0af910a64cf1c2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents hosted on the domain 'muicuiu.dumb1.com'. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is often used to distribute malicious content or to manipulate search engine results. While the ML classifier flagged this PDF as malicious with high confidence, the specific intent beyond linking to other PDFs is unclear due to the lack of executable scripts or a discernible document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/6a03a07a00a09a09/Een-Hiernamaals-Opstellen-In-Memoriams-by-Benno-Barnard.pdf
    • http://muicuiu.dumb1.com/1a01a07a02a09a02a08/Opstellen-over-de-Belgische-Arbeidersbeweging-by-Hector-Goossens.pdf
    • http://muicuiu.dumb1.com/5a02a00a02a03a04/Amor-fati-de-aanhankelijkheid-aan-het-levenslot-zeven-opstellen-over-Bergen-Belsen-by-Abel-J-Herzberg.pdf
    • http://muicuiu.dumb1.com/9a04a03a02a03a05/Schattenspiele-by-Benno-K-ps.pdf
    • http://muicuiu.dumb1.com/1a00a07a06a03a02a08/Prinzessin-Jungfrau-by-Benno-R-ttenauer.pdf
    • http://muicuiu.dumb1.com/8a07a08a04a00a01/Kunst-und-Handwerk-by-Benno-R-ttenauer.pdf
    • http://muicuiu.dumb1.com/8a01a01a06a01a07/Last-Post-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/5a01a05a01a07a05/Mahala-by-Chris-Barnard.pdf
    • http://muicuiu.dumb1.com/8a01a01a05a05a04/At-One-s-Beast-by-Rachel-Barnard.pdf
    • http://muicuiu.dumb1.com/8a01a01a04a03a09/Out-of-the-Blackout-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/9a00a03a01a05a06/Lustvolle-Begierden-Sex-Geschichten-by-Benno-Jund.pdf
    • http://muicuiu.dumb1.com/6a03a06a08a08a07/Benno-and-the-Night-of-Broken-Glass-by-Meg-Wiviott.pdf
    • http://muicuiu.dumb1.com/6a03a07a00a04a04/Euclid--The-Creation-of-Mathematics-by-Benno-Artmann.pdf
    • http://muicuiu.dumb1.com/6a03a06a08a08a09/The-Transfiguration-of-Benno-Blimpie-by-Albert-Innaurato.pdf
    • http://muicuiu.dumb1.com/2a06a05a03a08a07/A-Mansion-and-Its-Murder-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/1a09a02a02a09a05/A-Scandal-in-Belgravia-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/8a01a08a07a05a01/The-Graveyard-Position-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/8a01a01a04a03a01/Rebekah-s-Quilt-by-Sara-Barnard.pdf
    • http://muicuiu.dumb1.com/8a01a01a06a02a00/School-for-Murder-by-Robert-Barnard.pdf
    • http://muicuiu.dumb1.com/3a01a01a07a09a08/Chunky-Sugars-by-Sara-Barnard.pdf
    • http://muicuiu.dumb1.com/5a01a05a01a07a05/Mahala-

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