Malicious PDF — malware analysis report

Static analysis result for SHA-256 44485ea9483e85d2…

MALICIOUS

PDF

16.6 KB Created: 2019-05-02 00:56:33 +01:00 Authoring application: mPDF 5.7
MD5: 5725d05e80efd8a8b027d0941464dd48 SHA-1: d6b811813a900749ae4ebdeb8ec4742b97ef81e2 SHA-256: 44485ea9483e85d2540d951304e53a463b7960cbc7e9c6f22906e80540cdc6bf
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute further malicious content. The URLs themselves appear to be benign, but the pattern of embedding them is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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/1a09a01a01a01/Necrologue-The-Diva-Book-of-the-Dead-and-the-Undead-by-Helen-Sandler.pdf
    • http://muicuiu.dumb1.com/3a06a00a05a03a01/Donna-of-the-Not-Undead-of-the-Not-Undead-Book-1-by-Alex-Mosier.pdf
    • http://muicuiu.dumb1.com/2a06a02a08a09a06/Dead-Undead-or-Somewhere-in-Between-Rhiannon-s-Law-1-by-J-A-Saare.pdf
    • http://muicuiu.dumb1.com/3a06a01a02a08a04/Dead-Undead-or-Somewhere-in-Between-Rhiannon-s-Law-1-by-J-A-Saare.pdf
    • http://muicuiu.dumb1.com/3a01a04a09a04/The-Diva-Runs-Out-of-Thyme-A-Domestic-Diva-Mystery-1-by-Krista-Davis.pdf
    • http://muicuiu.dumb1.com/1a01a04a06a06a09a07/The-Diva-Cooks-up-a-Storm-A-Domestic-Diva-Mystery-11-by-Krista-Davis.pdf
    • http://muicuiu.dumb1.com/3a01a05a05a09a01/The-Diva-Paints-the-Town-A-Domestic-Diva-Mystery-3-by-Krista-Davis.pdf
    • http://muicuiu.dumb1.com/9a07a02a09a03a05/Blood-of-the-Dead-Undead-World-Trilogy-1-by-A-P-Fuchs.pdf
    • http://muicuiu.dumb1.com/9a07a03a01a00a07/Possession-of-the-Dead-Undead-World-Trilogy-2-by-A-P-Fuchs.pdf
    • http://muicuiu.dumb1.com/1a08a01a06a06a06/Dead-Over-Heels-Wyndham-Werewolf-6-Undead-6-5-by-MaryJanice-Davidson.pdf
    • http://muicuiu.dumb1.com/2a09a07a09a07a03/Wanted-Dead-or-Undead-Zombie-West-1-by-Angela-Scott.pdf
    • http://muicuiu.dumb1.com/3a06a00a07a01a04/Lightning-Fighting-the-Living-Dead-Undead-Rain-3-by-Shaun-Harbinger.pdf
    • http://muicuiu.dumb1.com/3a01a09a01a03/Wish-Me-Dead-by-Helen-Grant.pdf
    • http://muicuiu.dumb1.com/1a07a00a06a06a09/HOT-amp-GLAZED-Donut-Shop-Diva-Serial-Miranda-s-Book-1-by-Khloe-Adams.pdf
    • http://muicuiu.dumb1.com/4a08a05a02a09a05/Dead-Jealous-by-Helen-Durrant.pdf
    • http://muicuiu.dumb1.com/5a06a01a09a08a04/Dead-Lovely-by-Helen-Fitzgerald.pdf
    • http://muicuiu.dumb1.com/3a00a00a04a02a04/Days-with-the-Undead-Book-One-by-Julianne-Snow.pdf
    • http://muicuiu.dumb1.com/3a04a08a09a06a06/Dead-Wrong-Calladine-amp-Bayliss-1-by-Helen-H-Durrant.pdf
    • http://muicuiu.dumb1.com/1a05a05a06a06a04/The-Undead-Part-1-The-Undead-Series-Days-1-3-by-R-R-Haywood.pdf
    • http://muicuiu.dumb1.com/1a01a04a06a09a06a08/When-Crazy-s-Coming-The-Midlife-Misadventures-of-a-Midlife-Diva-Midlife-Diva-1-by-Trumillia-Lunnie-Thomas.pdf

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