Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51866044f4198fb…

MALICIOUS

PDF

15.3 KB Created: 2019-05-05 15:58:32 +01:00 Authoring application: mPDF 5.7
MD5: 881c6fa93149966eb2010cb3f57f2dc2 SHA-1: 23cf34ebb1b77c7e3fa74ce3df482933cd3b66bf SHA-256: f51866044f4198fb4a7c0874ec751e5e49af6d1b7d3bb318ed3de5a64303b78a
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 pointing to external resources, identified by the PDF_SEO_LINK_FARM heuristic. While the specific URLs extracted are currently marked as benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/3a04a04a08a03a06/The-Rithmatist-Rithmatist-1-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/3a06a06a09a02a09/The-Rithmatist-Rithmatist-1-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/2a01a04a03a02a03/The-Aztlanian-Rithmatist-2-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/6a03a00a01a06a07/Brandon-Sanderson-Stormlight-Archive-Book-One-Collection-2-Books-Bundle-With-Gift-Journal-The-Way-of-Kings-Part-One-The-Way-of-Kings-Part-Two-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/8a03a04a02a02a02/Legion-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/2a01a06a01a08a08/Lift-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/5a04a03a05/Snapshot-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/3a04a00a01a09a04/Firstborn-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a04a07a09a01a08/Shadows-of-Self-Mistborn-5-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a01a01a01a08a04/Sixth-of-the-Dusk-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a04a01a05a09/The-Alloy-of-Law-Mistborn-4-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/3a07a06a03a07a01/The-Alloy-of-Law-Mistborn-4-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/5a09a04a04a00a01/White-Sand-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/1a07a04a02a01a00/Mitosis-The-Reckoners-1-5-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a06a09a08a06a02/Elantris-Part-1-of-3-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a02a08a02a00/The-Well-of-Ascension-Mistborn-2-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/5a07a07a09a05/Steelheart-Reckoners-1-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/3a01a01a05a09a09/The-Well-of-Ascension-Mistborn-2-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/2a01a04a03a03a09/Nightblood-Warbreaker-2-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a07a01a08a02a07/Shadows-of-Self-Mistborn-5-by-Brandon-Sanderson.pdf
    • http://muicuiu.dumb1.com/4a01a01a

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