Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d8447a8363437f…

MALICIOUS

PDF

11.7 KB Created: 2019-05-07 03:17:39 +01:00 Authoring application: mPDF 5.7
MD5: e4c886449c31b6569ecbfe775a74dc2f SHA-1: 819371b6ed4086d87c8925bb08ebcb9684143de6 SHA-256: b1d8447a8363437f61906f7cec2edd39756a13f6134ad65be6756ccde090092f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on the domain 'muicuiu.dumb1.com'. This is indicative of a link farm or SEO poisoning attack, designed to drive traffic to potentially malicious content. While the ML classifier flagged it as malicious, the specific payload or intent beyond linking is not clear from the provided evidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7866

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/1a09a07a01a09a09/The-Use-of-Man-by-Aleksandar-Ti-ma.pdf
    • http://muicuiu.dumb1.com/5a02a00a01a05a07/Love-and-Obstacles-by-Aleksandar-Hemon.pdf
    • http://muicuiu.dumb1.com/7a04a00a09a03a02/New-American-Stories-by-Aleksandar-Hemon.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a09a05a05/Chess-Informant-25-by-Aleksandar-Matanovi-.pdf
    • http://muicuiu.dumb1.com/1a01a01a07a01a00a06/Chess-Informant-51-by-Editor-MATANOVIC-ALEKSANDAR.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a08a04a02/Encyclopedia-of-Chess-Openings-C-by-Aleksandar-Matanovi-.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a08a04a03/Encyclopedia-of-Chess-Openings-E-by-Aleksandar-Matanovi-.pdf
    • http://muicuiu.dumb1.com/4a04a05a03a07a01/Best-European-Fiction-2011-by-Aleksandar-Hemon.pdf
    • http://muicuiu.dumb1.com/7a04a00a07a00a06/Best-European-Fiction-2013-by-Aleksandar-Hemon.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a09a05a04/Small-Encyclopedia-of-Chess-Openings-by-Aleksandar-Matanovi-.pdf
    • http://muicuiu.dumb1.com/7a04a00a07a01a00/Good-Living-A-Free-Story-from-Selected-Shorts-New-American-Stories-by-Aleksandar-Hemon.pdf
    • http://muicuiu.dumb1.com/7a04a00a07a01a04/A-Study-Guide-for-Aleksandar-Hemon-s-quot-islands-quot-by-Cengage-Learning-Gale.pdf
    • http://muicuiu.dumb1.com/6a02a03a00a04a07/Regards-from-Serbia-A-Cartoonist-s-Diary-of-a-Crisis-in-Serbia-by-Aleksandar-Zograf.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a09a05a00/Encyclopaedia-of-Chess-Endings-I-Pawn-Endings-2nd-ed-by-Aleksandar-Matanovi-.pdf
    • http://muicuiu.dumb1.com/7a04a00a07a01a00/Good-Living-

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