Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2ede33bf35b885…

MALICIOUS

PDF

15.8 KB Created: 2019-05-02 01:21:30 +01:00 Authoring application: mPDF 5.7
MD5: c51728e49706ca59c4ff643c8b9c2892 SHA-1: 5d4fba5d45a48e986aedf870c5e766f3890fb9fa SHA-256: 2c2ede33bf35b885fe73e89da8d93697e61cdbe7c4d4756924e740985aac051f
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm, with numerous URLs pointing to documents hosted on 'muicuiu.dumb1.com'. While the ML classifier also indicated maliciousness, the specific intent beyond link farming is unclear due to the lack of executable scripts or clear document body content. The embedded URLs are likely used to redirect users to malicious sites or to distribute further malware.

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.d
    • http://muicuiu.dumb1.com/8a00a07a09a06a01/Romeo-and-Juliet-Student-and-Teacher-Edition-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/7a03a06a07a00a08/Shakespeare-Romeo-And-Juliet-Total-Study-Edition-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/6a02a06a01a04a00/Romeo-and-Juliet-Digital-Age-Edition-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a09a03a04a00a09/Macbeth-Student-and-Teacher-Edition-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/7a01a05a04a06a04/Romeo-and-Juliet-Chinese-Edition-----by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a03a01a02a01a04/Romeo-and-Juliet-German-Learning-Edition-with-Paragraph-By-Paragraph-Translation-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a06a06a04a02a09/Romeo-and-Juliet-no-fear-shakespeare-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/6a06a03a05a01a04/Romeo-And-Juliet-Shakespeare-Appreciated-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/1a01a08a02a00a02a07/Romeo-And-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a02a03a07a02a07/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a05a00a07a01a06/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/8a02a07a00a01a07/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/9a05a06a09a08a06/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a04a00/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a05a07a01a05a00/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/6a09a02a04a03a01/Romeo-And-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a04a00a03a08a04/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/5a06a00a08a02a07/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/1a01a03a05a05a06a02/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://muicuiu.dumb1.com/1a01a05a05a01a01a03/Romeo-and-Juliet-by-William-Shakespeare.pdf

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