Malicious PDF — malware analysis report

Static analysis result for SHA-256 763aa039860417ff…

MALICIOUS

PDF

17.5 KB Created: 2019-04-30 03:04:57 +01:00 Authoring application: mPDF 5.7
MD5: fab939f66d0de9968d8111c159fdbf5c SHA-1: 5222207132d6802222fbcee7a02af7a7f99fc3fd SHA-256: 763aa039860417ff5ec702770fd8ec5d5933c8bfb671e9a6bc55345237464aef
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent, possibly to lure users to a compromised site or to mask the true malicious payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/1a00a04a06a03a01a03/The-Third-Reich-in-History-and-Memory-by-Richard-J-Evans.pdf
    • http://muicuiu.dumb1.com/1a04a02a08a03a09/The-Third-Reich-in-Power-The-History-of-the-Third-Reich-2-by-Richard-J-Evans.pdf
    • http://muicuiu.dumb1.com/8a08a07a01a07a08/Il-Terzo-Reich-in-guerra-Come-il-Nazismo-ha-portato-la-Germania-dal-trionfo-al-disastro-by-Richard-J-Evans.pdf
    • http://muicuiu.dumb1.com/3a08a01a07a09a06/A-Social-History-of-the-Third-Reich-by-Richard-Grunberger.pdf
    • http://muicuiu.dumb1.com/7a02a09a00a05a09/Munich-and-Memory-Architecture-Monuments-and-the-Legacy-of-the-Third-Reich-by-Gavriel-D-Rosenfeld.pdf
    • http://muicuiu.dumb1.com/5a01a08a02a04a06/The-Legend-of-John-Wilkes-Booth-Myth-Memory-and-a-Mummy-by-C-Wyatt-Evans.pdf
    • http://muicuiu.dumb1.com/4a02a00a06a02a05/The-Rise-and-Fall-of-the-Third-Reich-A-History-of-Nazi-Germany-by-William-L-Shirer.pdf
    • http://muicuiu.dumb1.com/1a01a00a09a08a07a05/The-Third-Reich-in-100-Objects-A-Material-History-of-Nazi-Germany-by-Roger-Moorhouse.pdf
    • http://muicuiu.dumb1.com/2a06a06a04a00a00/The-Rise-and-Fall-of-the-Third-Reich-A-History-of-Nazi-Germany-by-William-L-Shirer.pdf
    • http://muicuiu.dumb1.com/8a01a08a06a09/The-Last-Promise-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/2a00a07a05/The-Mistletoe-Inn-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/4a05a09a04a09/The-Looking-Glass-The-Locket-2-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a00a06a00a07a03a03/Dialogue-with-Erik-Erikson-by-Richard-I-Evans.pdf
    • http://muicuiu.dumb1.com/4a08a00a05a00a06/The-Mistletoe-Promise-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a03a05a08a02a03/Miles-to-Go-The-Walk-2-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/2a08a04a06a05a05/Miles-to-Go-The-Walk-2-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a09a01a09a05a07/The-Letter-The-Christmas-Box-3-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a03a05a06a08a05/A-Winter-Dream-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/8a02a03a05a00/The-Road-to-Grace-The-Walk-3-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a03a05a07a03a09/A-Step-of-Faith-The-Walk-4-by-Richard-Paul-Evans.pdf
    • http://muicuiu.dumb1.com/1a01a00a0

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