Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e4717db1345c18…

MALICIOUS

PDF

13.1 KB Created: 2019-04-30 02:50:20 +01:00 Authoring application: mPDF 5.7
MD5: 3024ab072a0a77dd23fc97e15f35000d SHA-1: e650b35b75f277481f8cb0e5aa679ccf549082dd SHA-256: 58e4717db1345c18874c50920b1c41b81a6dd8a487d9e8f097fd09833605188d
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the PDF structure and link farm heuristic strongly suggest a malicious intent, likely to distribute further malware or engage in phishing. The URLs provided are considered benign by reputation, but the overall pattern is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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/7a05a07a03a01a09/Mori-No-Seikatsu-W-ruden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a09a04a04a06a04/Wild-Fruits-Thoreau-s-Rediscovered-Last-Manuscript-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a02a01a03a02a04/Thoreau-on-Wolf-Hill-Henry-David-Thoreau-Mystery-2-by-B-B-Oak.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a06a04/A-Year-in-Thoreau-s-Journal-1851-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a04a08/The-Quotable-Thoreau-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a05a01a08a07a01/The-Wisdom-Of-Thoreau-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a01a09a04a08a00/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/2a08a07a09a04a08/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a03a09a01a06a00/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/9a09a03a08a06/Walking-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a06a08a08a01a08/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/4a03a07a02a05/Walking-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a00a09a06a03a00a07/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a01a04a01a07a04a00/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/6a01a06a00a09a00/Walden-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/6a07a09a04a04/Wild-Apples-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/3a06a07a06a04a05/Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/5a09a06a06a00/Civil-Disobedience-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/6a01a08a04a09/Life-Without-Principle-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/8a01a09a06a05a01/Walking-Annotated-Edition-by-Henry-David-Thoreau.pdf
    • http://muicuiu.dumb1.com/1a00a09a06a03

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