Malicious PDF — malware analysis report

Static analysis result for SHA-256 503ee59fbc3598e2…

MALICIOUS

PDF

12.3 KB Created: 2019-05-07 04:42:22 +01:00 Authoring application: mPDF 5.7
MD5: 9496696f21e750aea18a30c38e96b78f SHA-1: 93cc92a9eb0bbb90b549ca6413f8acc320c67905 SHA-256: 503ee59fbc3598e2d6fd4ae4a4130681db4c0a6c642ba4d80973f960eb1916c5
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are currently marked as benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to serve as a lure for further malicious activity. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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.dumb
    • http://muicuiu.dumb1.com/4a02a09a02a03a06/The-Passage-The-Passage-1-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/1a00a08a00a08/The-Passage-The-Passage-1-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/2a07a01a04a07a09/The-Passage-The-Passage-1-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/3a00a08a06a09a02/The-Passage-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/3a06a04a00a01a03/The-Passage-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/4a05a08a06a05a01/The-Twelve-The-Passage-2-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/3a01a02a01a03a00/The-Twelve-The-Passage-2-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/3a04a02a01/The-City-of-Mirrors-The-Passage-3-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/1a05a01a02a03a09/Mary-and-O-Neil-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/5a09a06a05a05/The-Summer-Guest-by-Justin-Cronin.pdf
    • http://muicuiu.dumb1.com/5a05a06a07a05a08/Icy-Passage-by-Ann-Gimpel.pdf
    • http://muicuiu.dumb1.com/5a05a06a08a03a02/Magnificent-Passage-by-Kat-Martin.pdf
    • http://muicuiu.dumb1.com/5a00a01a02a07a06/Gideon-s-Passage-by-Ben-Laffra.pdf
    • http://muicuiu.dumb1.com/1a07a00a05a06a02/Passage-of-Time-by-R-W-K-Clark.pdf
    • http://muicuiu.dumb1.com/4a07a02a09a03a05/A-Passage-to-India-by-E-M-Forster.pdf
    • http://muicuiu.dumb1.com/3a01a09a08a02a03/A-Passage-to-India-by-E-M-Forster.pdf
    • http://muicuiu.dumb1.com/4a01a02a08a09a06/A-Passage-to-India-by-E-M-Forster.pdf
    • http://muicuiu.dumb1.com/5a05a06a06a05a04/The-Passage-by-Michael-Hurley.pdf
    • http://muicuiu.dumb1.com/2a08a09a09a07a08/A-Passage-to-India-by-E-M-Forster.pdf
    • http://muicuiu.dumb1.com/3a07a08a06a02a00/Uncharted-Passage-by-Julie-Cannon.pdf

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