Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa930b138b30694…

MALICIOUS

PDF

19.4 KB Created: 2019-05-05 16:06:59 +01:00 Authoring application: mPDF 5.7
MD5: 691c94b606b06b8aadb9b4c77fb9bfa6 SHA-1: 729674e21930da0dc1ca1d92362434d32be2942a SHA-256: 9aa930b138b306943f07b9f6005e800c59d6f655d2121ea956563017473c3dde
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. While the document body is heavily corrupted, the presence of numerous links suggests a malicious intent, likely for SEO poisoning or to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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/9a06a02a00a02a09/The-Adventures-of-Tom-Sawyer-by-Mark-Twain-Illustrated-by-Norman-Rockwell-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/5a07a06a09a05a00/Mark-Twain-s-Adventures-of-Tom-Sawyer-The-Original-Text-Edition-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/6a00a01a02a02a07/The-Adventures-of-Tom-Sawyer-English-Spanish-Edition-illustrated-Las-aventuras-de-Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/8a08a06a04a03a03/The-Adventures-of-Tom-Sawyer-Tom-Sawyer-and-Huck-Finn-1-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/1a01a05a01a05a09a02/Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/9a02a09a05a07a03/Level-1-The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/7a09a06a09a07a01/The-Adventures-of-Tom-Sawyer-Annotated-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/7a03a06a03a01a01/The-Adventures-of-Huckleberry-Finn-Tom-Sawyer-s-Comrade-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/7a01a09a02a07a07/The-Adventures-of-Tom-Sawyer-The-Big-Read-Alabama-Edition-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/5a06a04a07a02a01/THE-ADVENTURES-OF-TOM-SAWYER-New-Edition-With-Original-Drawings-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/5a02a09a09a02a05/The-Adventures-of-Tom-Sawyer-Illustrated-plus-free-audiobook-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/5a04a00a09a06a01/The-Adventures-of-Tom-Sawyer-Golden-Illustrated-Classics-Comes-with-a-Free-Audiobook-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/8a06a01a07a00a01/The-Adventures-of-Tom-Sawyer---Complete-Version-ANNOTATED-amp-UNABRIDGED-with-Exclusive-Features-Author-s-biography-Adaptations-Reviews-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/9a01a09a06a02a07/Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/5a06a03a01a06a05/Les-Aventures-De-Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/8a05a02a09a08a00/Les-Aventures-De-Tom-Sawyer-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/4a07a00a08a09a01/Tom-Sawyer-Abroad-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/7a05a01a01a05a03/Tom-Sawyer-amp-Huckleberry-Finn-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/1a00a04a01a07a07a07/Le-avventure-di-Tom-Sawyer-Audio-eBook-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/6a03a05a09a04a08/Les-aventures-de-Tom-Sawyer-et-les-aventures-de-Huckleberry-Finn-illustr-es-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/7a01a09a02a07a07/The-Adventures-of-Tom-Sawyer-The-Big-Read-Alabama-Edition-by-Mark

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