Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afd4e4af75da664…

MALICIOUS

PDF

17.5 KB Created: 2019-05-07 05:11:54 +01:00 Authoring application: mPDF 5.7
MD5: d141945e848063b684793b50177ee78b SHA-1: 8e88e8d8df6f5b1ee8b85719c7789dff79f21bbc SHA-256: 5afd4e4af75da6640de537cfe15fc9a23e7880e858db84816610d8dcb5d241e8
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, and a heuristic for a visual download button. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to direct the user to external resources. The ML classifier strongly indicates maliciousness, and the overall structure points towards a phishing or social engineering attack, likely involving the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/2a00a04a06a03a08/DarkWolfe-Sons-of-de-Wolfe-de-Wolfe-Pack-9-by-Kathryn-Le-Veque.pdf
    • http://muicuiu.dumb1.com/2a00a04a06a03a05/Nighthawk-Sons-of-de-Wolfe-de-Wolfe-Pack-7-by-Kathryn-Le-Veque.pdf
    • http://muicuiu.dumb1.com/3a05a06a08a08a04/Archie-Meets-Nero-Wolfe-A-Prequel-to-Rex-Stout-s-Nero-Wolfe-Mysteries-Nero-Wolfe-Novels-by-Robert-Goldsborough-8-by-Robert-Goldsborough.pdf
    • http://muicuiu.dumb1.com/3a00a01a06a00a00/Red-amp-Wolfe-Part-One-Red-amp-Wolfe-1-by-Ella-James.pdf
    • http://muicuiu.dumb1.com/3a09a04a06a06a06/Red-amp-Wolfe-Part-Four-Red-amp-Wolfe-4-by-Ella-James.pdf
    • http://muicuiu.dumb1.com/8a09a08a09a07a03/Waking-Wolfe-Scott-Wolfe-1-by-S-L-Shelton.pdf
    • http://muicuiu.dumb1.com/3a07a04a06a03a04/Wolfe-Winter-Big-Bad-Wolfe-5-by-Joan-Hohl.pdf
    • http://muicuiu.dumb1.com/2a05a08a04a01/The-Best-of-Gene-Wolfe-A-Definitive-Retrospective-of-His-Finest-Short-Fiction-by-Gene-Wolfe.pdf
    • http://muicuiu.dumb1.com/8a04a04a09a02a00/The-Haunting-of-Nathaniel-Wolfe-Nathaniel-Wolfe-1-by-Brian-Keaney.pdf
    • http://muicuiu.dumb1.com/4a02a04a01a04a03/Charlotte-Au-Chocolat-Memories-of-a-Restaurant-Girlhood-by-Charlotte-Silver.pdf
    • http://muicuiu.dumb1.com/3a07a07a04a07a02/A-Study-in-Charlotte-Charlotte-Holmes-1-by-Brittany-Cavallaro.pdf
    • http://muicuiu.dumb1.com/4a00a06a08a04a03/A-Study-in-Charlotte-Charlotte-Holmes-1-by-Brittany-Cavallaro.pdf
    • http://muicuiu.dumb1.com/7a07a05a04a08a06/Villette-Novel-by-Charlotte-Bronte-Introduction-By-Mrs-Humphry-Ward-Illustrated-with-Portraits-and-Wievs-by-Charlotte-Bront-.pdf
    • http://muicuiu.dumb1.com/6a00a02a07a09a07/The-5-Heads-of-Humbert-Wolfe-by-Humbert-Wolfe.pdf
    • http://muicuiu.dumb1.com/3a06a04a08a06/The-Terror-by-Dan-Simmons.pdf
    • http://muicuiu.dumb1.com/2a07a07a07a04a04/Ilium-by-Dan-Simmons.pdf
    • http://muicuiu.dumb1.com/6a04a08a08a03a05/Hyperion-by-Dan-Simmons.pdf
    • http://muicuiu.dumb1.com/1a05a05a09a08a08/Flu-Flu-1-by-Wayne-Simmons.pdf
    • http://muicuiu.dumb1.com/2a07a08a04a05a06/Ilium-by-Dan-Simmons.pdf
    • http://muicuiu.dumb1.com/1a00a09a00a01/Drood-by-Dan-Simmons.pdf

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