Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad2662201e9e875…

MALICIOUS

PDF

15.8 KB Created: 2019-05-05 16:08:48 +01:00 Authoring application: mPDF 5.7
MD5: c567d191163fbbacde7dd897805e4f87 SHA-1: cb9eacb6a86b85e061b941811570433a69713c37 SHA-256: 7ad2662201e9e8751b8cda46e29858807957f4c9c8c3a4c73523d9a607fbaeaf
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged the document as malicious, the specific intent appears to be the creation of a link farm rather than direct execution of a payload. The document body was unreadable, and no scripts were extracted, limiting further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/8a08a09a06a07/Echo-amp-Lightning-by-Sheila-Packa.pdf
    • http://muicuiu.dumb1.com/1a01a08a01a03a03a07/Amazon-Echo-Amazon-Echo-Advanced-User-Guide-2016-Updated-Echo-Amazon-Echo-User-Manual-Amazon-Alexa-Amazon-Echo-Dot-Amazon-Echo-ebook-by-Jamy-Jackson.pdf
    • http://muicuiu.dumb1.com/2a00a02a07a00a08/Lightning-Lingers-Lightning-Strikes-2-by-Barbara-Freethy.pdf
    • http://muicuiu.dumb1.com/2a00a00a09a06a03/When-an-Echo-Returns-Echo-Branson-2-by-Linda-Kay-Silva.pdf
    • http://muicuiu.dumb1.com/9a02a00a00a07a03/Echo-Desert-Run-Echo-3-by-Terry-Moore.pdf
    • http://muicuiu.dumb1.com/2a03a03a05a03a01/Resonance-An-Echo-Trilogy-Novella-Echo-Trilogy-1-5-by-Lindsey-Fairleigh.pdf
    • http://muicuiu.dumb1.com/2a04a04a00a09a03/The-Lightning-Catcher-The-Lightning-Catcher-1-by-Anne-Cameron.pdf
    • http://muicuiu.dumb1.com/2a08a02a09a06a09/The-Witches-of-Echo-Park-The-Witches-of-Echo-Park-1-by-Amber-Benson.pdf
    • http://muicuiu.dumb1.com/1a00a02a03a09a06a08/The-Bald-Mermaid-A-Memoir-A-Sheila-Bridges-Memoir-by-Sheila-Bridges.pdf
    • http://muicuiu.dumb1.com/3a01a01a08a02a08/Never-Alone-amp-The-First-Lightning-Bug-by-Phillip-Rhoades.pdf
    • http://muicuiu.dumb1.com/1a06a02a01a05a04/Ball-Lightning-by-Liu-Cixin.pdf
    • http://muicuiu.dumb1.com/8a01a01a04a06/Lightning-Bug-by-Donald-Harington.pdf
    • http://muicuiu.dumb1.com/2a07a03a01a07a03/The-Lightning-Prophecy-by-Emily-Cyr.pdf
    • http://muicuiu.dumb1.com/6a08a01a06a03a08/The-Lightning-And-The-Sun-by-Savitri-Devi.pdf
    • http://muicuiu.dumb1.com/3a03a05a01a03/Lightning-by-Dean-Koontz.pdf
    • http://muicuiu.dumb1.com/7a06a02a05a03/Lightning-by-Jean-Echenoz.pdf
    • http://muicuiu.dumb1.com/2a07a00a00a03a04/The-Court-of-Lightning-by-Amy-Rae-Durreson.pdf
    • http://muicuiu.dumb1.com/2a03a03a05a01a00/The-Taste-of-Lightning-by-Kate-Constable.pdf
    • http://muicuiu.dumb1.com/3a09a00a06a09/When-Lightning-Strikes-1-800-Where-R-You-1-by-Jenny-Carroll.pdf
    • http://muicuiu.dumb1.com/1a02a08a04a00a09/Black-Lightning-by-John-Saul.pdf

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