Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe18c3843779907…

MALICIOUS

PDF

20.6 KB Created: 2019-05-02 01:30:36 +01:00 Authoring application: mPDF 5.7 First seen: 2019-06-27
MD5: 1bd76d05a270ea0aa92ac9ffb81c8923 SHA-1: 28411f34fe4bc9097acc2af12dca8663f573a420 SHA-256: ebe18c38437799075cf434e77ef6ea4cf8b218e74c263d6ea3134e15055ba6f5
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external documents, identified by the PDF_SEO_LINK_FARM heuristic. While the specific URLs extracted appear benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to host further malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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/6a06a08a08a07a08/The-Karamazov-Brothers-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/1a00a04a07a08a04a08/The-Brothers-Karamazov-Annotated-with-Critical-Essay-and-Biography-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/6a00a09a06a09a00/The-Brothers-Karamazov-Backgrounds-and-Sources-Essays-in-Criticism-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/6a03a06a05a09a07/The-Brothers-Karamazov-Illustrated-Annotated-amp-Study-Guide-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/9a01a04a04a00a05/The-Brothers-Karamazov-Annotated-Quotes-Adaptations-Other-Features-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/1a01a00a06a03a06a09/The-Brothers-Karamazov-Illustrated-Annotated-Footnotes-Navigation-Best-Russian-Classics-Book-3-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/7a04a03a03a05a00/The-Brother-Karamazov-The-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/9a00a01a09a06a00/The-Brothers-Karamazov-I-love-mankind-he-said-quot-but-I-find-to-my-amazement-that-the-more-I-love-mankind-as-a-whole-the-less-I-love-man-in-particular-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/9a08a05a04a03a00/Notes-from-Underground-by-Fyodor-Dostoyevsky---Delphi-Classics-Illustrated-Delphi-Parts-Edition-Fyodor-Dostoyevsky-Book-8-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/5a09a03a04a00a05/Crime-and-Punishment-By-Fyodor-Dostoyevsky-amp-Illustrated-An-Audiobook-Free-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/4a07a00a07a07a09/The-Possessed-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/4a06a08a06a05a00/The-Meek-One-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/7a08a04a05a08/The-Crocodile-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/7a05a07a03a04a04/The-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/1a07a08a02a04a09/The-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/3a02a03a01a09/The-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/1a03a05a05a05a04/The-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/5a05a01a01a03a01/L-Idiot-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/5a09a08a04a06a08/The-Possessed-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/6a08a02a06a09/El-idiota-by-Fyodor-Dostoyevsky.pdf
    • http://muicuiu.dumb1.com/1a01a00a06a03a06a09/The-Brothers-Karamazov-Illustrated-Annotated-Footnotes-Navigation-Best-Russian-Classics-Book-3-by-

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