Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8b73e8da8d7ede…

MALICIOUS

PDF

16.0 KB Created: 2019-05-02 01:00:31 +01:00 Authoring application: mPDF 5.7
MD5: 1e06b3924568a03df78994638e41fbd3 SHA-1: 2c06b9465c15ff09259ce401be696bd73b8703ca SHA-256: 3c8b73e8da8d7eded362e06b296ec70a77b287845a3bbd3f16cc442f447eadf7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While the specific URLs extracted were labeled benign, the sheer volume and structure suggest a malicious intent to distribute or obscure malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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/6a00a02a07a09a08/The-5-Heads-of-Humbert-Wolfe-by-A-D-Padgett.pdf
    • http://muicuiu.dumb1.com/6a00a02a07a09a07/The-5-Heads-of-Humbert-Wolfe-by-Humbert-Wolfe.pdf
    • http://muicuiu.dumb1.com/1a05a09a07a01a09/Severed-A-History-of-Heads-Lost-and-Heads-Found-by-Frances-Larson.pdf
    • http://muicuiu.dumb1.com/1a04a00a08a00a09/Counting-Heads-Counting-Heads-1-by-David-Marusek.pdf
    • 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/3a09a04a06a06a06/Red-amp-Wolfe-Part-Four-Red-amp-Wolfe-4-by-Ella-James.pdf
    • http://muicuiu.dumb1.com/3a07a04a06a03a04/Wolfe-Winter-Big-Bad-Wolfe-5-by-Joan-Hohl.pdf
    • http://muicuiu.dumb1.com/8a09a08a09a07a03/Waking-Wolfe-Scott-Wolfe-1-by-S-L-Shelton.pdf
    • http://muicuiu.dumb1.com/3a00a01a06a00a00/Red-amp-Wolfe-Part-One-Red-amp-Wolfe-1-by-Ella-James.pdf
    • http://muicuiu.dumb1.com/1a09a02a05a06a01/The-Big-Something-by-Ron-Padgett.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/3a03a01a02a09a08/Edisto-by-Padgett-Powell.pdf
    • http://muicuiu.dumb1.com/1a05a01a07a09/Edisto-by-Padgett-Powell.pdf
    • http://muicuiu.dumb1.com/3a08a06a07a04a03/Moonbird-Boy-Bo-Bradley-4-by-Abigail-Padgett.pdf
    • http://muicuiu.dumb1.com/5a08a08a02a08a07/The-Accidental-Savant-by-Jason-Padgett.pdf
    • http://muicuiu.dumb1.com/2a07a01a08a04/Child-of-Silence-Bo-Bradley-1-by-Abigail-Padgett.pdf
    • http://muicuiu.dumb1.com/3a00a05a06a05a09/Child-of-Silence-Bo-Bradley-1-by-Abigail-Padgett.pdf
    • http://muicuiu.dumb1.com/5a00a05a02a03a07/A-Moonlit-Serenade-Seattle-Sound-8-by-Alexa-Padgett.pdf
    • http://muicuiu.dumb1.com/8a09a08a09a07a03/Waking-Wolfe-Scott-Wolfe-1-by-S

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