Malicious PDF — malware analysis report

Static analysis result for SHA-256 626de0d5ba09b9cf…

MALICIOUS

PDF

12.7 KB Created: 2019-05-03 09:18:01 +01:00 Authoring application: mPDF 5.7
MD5: c364028805011f9869c23e4fb171a08a SHA-1: aa55afa5f9001ea6e9f767ba527d9331ea08d2c8 SHA-256: 626de0d5ba09b9cfca82a33d2b31121b3a62bb749082b2a8f9c7cb98e12047fe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDF files, suggesting a link farm designed to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the linked PDFs is unclear, the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/4a04a06a05a06a09/No-Man-s-Land-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/1a02a03a08a06a04/Our-Man-in-Havana-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/3a00a03a09a03a02/Our-Man-in-Havana-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a07a00a01a07a06/The-End-of-the-Affair-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a04a00a09a08a00/The-Tenth-Man-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a08a08a07a06a02/A-Gun-for-Sale-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/1a03a07a00a09a00/The-Tenth-Man-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/4a04a06a01a01a00/The-Ministry-of-Fear-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/9a00a03a08a08a03/Brighton-Rock-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/5a00a00a08a03a04/Monsignor-Quixote-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a05a09a09a06a02/The-Quiet-American-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/4a01a00a08a00a08/The-Ministry-of-Fear-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a05a07a05a01a07/Journey-Without-Maps-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/7a04a02a07a06a01/Loser-Takes-All-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/4a01a00a00a03a07/The-Heart-of-the-Matter-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/2a00a05a01a00a00/The-Power-and-the-Glory-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/3a03a01a07a09/The-Power-and-the-Glory-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/8a09a01a05a09/The-Ministry-of-Fear-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/4a07a05a07a03a05/A-Sort-Of-Life-by-Graham-Greene.pdf
    • http://muicuiu.dumb1.com/4a03a09a06a03a08/The-Power-and-the-Glory-by-Graham-Greene.pdf

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