Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a54b4dc48b8858b…

MALICIOUS

PDF

15.6 KB Created: 2019-11-07 09:37:15 +00:00 Authoring application: mPDF 5.7
MD5: 0e4f8da1312a8ac44ffc33eba28ccc44 SHA-1: b6c36f855a1a6a9c847007b0bb1f4cf8ade212de SHA-256: 0a54b4dc48b8858b31120c010a2ff038e4b2251e95573a7a03ca92e80f27ab4b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on the same domain. This suggests a link farm or redirection scheme designed to drive traffic. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file, likely acting as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7521633-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7521633-0
  • 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://cefasfese.4pu.com/7731731735738738/Hamlet-Shakespeare-Appreciated-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/6736736730735730/Romeo-and-Juliet-Shakespeare-Appreciated-SmartPass-Audio-Education-Study-Guide-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/7732731734739738/Macbeth-Shakespeare-Appreciated-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/7731733731733737/Hamlet-By-William-Shakespeare-amp-Illustrated-An-Audiobook-Free-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/7739735739736736/Hamlet-An-Anthology-of-Russian-translations-1828-1880-William-Shakespeare-Gamlet-Antologiya-russkikh-perevodov-1828-1880-Uilyam-Shexpir-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5737739736730736/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5733730738730738/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/6733735734731/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/4736732730738737/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5733733735730736/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5734732738739737/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/9732738738731737/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5733731733732731/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/9730735732738735/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5735730730736739/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5734731736735730/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/6735734739735739/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/5735739733735/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/8734735732731/Hamlet-by-William-Shakespeare.pdf
    • http://cefasfese.4pu.com/7732731734736734/Hamlet-by-William-Shakespeare.pdf

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