Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8eb4c60ed5f0bc5…

MALICIOUS

PDF

16.8 KB Created: 2019-05-05 16:23:16 +01:00 Authoring application: mPDF 5.7
MD5: 95b324422cc9c179a8d37e704e5f8a0d SHA-1: 604f4e98e37adf6c6521755838c437f42defb90f SHA-256: b8eb4c60ed5f0bc578778e4aaa25df8d8e57ab0887740305b0b212ea8f56275e
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, forming a link farm that directs users to external PDF documents. This is indicative of a SEO poisoning or link-farming attack, likely intended to drive traffic or potentially distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/5a00a00a02a03a04/The-Autobiography-of-an-Ex-Colored-Man-by-James-Weldon-Johnson.pdf
    • http://muicuiu.dumb1.com/1a03a07a07a03a00/The-Autobiography-of-an-Ex-Colored-Man-by-James-Weldon-Johnson.pdf
    • http://muicuiu.dumb1.com/1a01a04a09a01a02/Lift-Every-Voice-and-Sing-by-James-Weldon-Johnson.pdf
    • http://muicuiu.dumb1.com/1a00a04a05a09a04/The-Autobiography-of-an-Ex-Colored-Man-and-Other-Writings-Barnes-amp-Noble-Classics-Series-by-James-Weldon-Johnson.pdf
    • http://muicuiu.dumb1.com/8a05a00a00a03a02/Twenty-Years-A-Fakir-by-s-james-weldon.pdf
    • http://muicuiu.dumb1.com/1a02a02a06a01a09/Chasing-Spirits---The-Memoirs-of-Reginald-Weldon-by-Glynn-James.pdf
    • http://muicuiu.dumb1.com/5a05a07a02a07a02/A-Theory-of-Creation-A-Review-of-Vestiges-of-the-Natural-History-of-Creation-by-Francis-Bowen.pdf
    • http://muicuiu.dumb1.com/1a01a03a00a05a01a01/Carmack-of-the-Klondike-by-James-Albert-Johnson.pdf
    • http://muicuiu.dumb1.com/2a05a03a02a05a09/The-Life-of-Samuel-Johnson-by-James-Boswell.pdf
    • http://muicuiu.dumb1.com/1a00a00a00a04a03a04/Rational-Praise-And-Natural-Lamentation-Johnson-Lycidas-And-Principles-Of-Criticism-by-James-L-Battersby.pdf
    • http://muicuiu.dumb1.com/4a09a07a02a01a01/Before-The-War-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/4a06a07a08a02a08/The-Spa-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/2a06a03a09a01a00/The-Spa-Decameron-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/1a03a09a06a02a03/Down-Among-the-Women-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/1a09a09a07a01a01/Mantrapped-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/5a04a02a05a09a04/Grimoire-by-Phaedra-Weldon.pdf
    • http://muicuiu.dumb1.com/7a07a01a03a08/Female-Friends-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/4a02a01a00a03a03/The-Shrapnel-Academy-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/1a00a03a05a05a07/The-Stepmother-s-Diary-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/1a00a04a05a00a09/Worst-Fears-by-Fay-Weldon.pdf
    • http://muicuiu.dumb1.com/5a05a07a02a07a02/A-Theory-of-Creation-A-Review-of-Vestiges-of-the-Natural-Histor

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