Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56c910d458a472a…

MALICIOUS

PDF

17.6 KB Created: 2019-05-07 02:54:50 +01:00 Authoring application: mPDF 5.7
MD5: 6d069058e7e6271bac1532c2bd914e19 SHA-1: 7fcbdb4d4757615c26dc469147f70a6dbef82849 SHA-256: a56c910d458a472aec04aaf695aad0077cf31059b756e9e9ef24748de76dcf84
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While most of these URLs are marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM suggest a malicious intent, likely for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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.dumb
    • http://muicuiu.dumb1.com/3a04a09a09a07a00/Leaving-Montana-by-Thomas-Whaley.pdf
    • http://muicuiu.dumb1.com/3a00a00a05a07/Leaving-Montana-by-Thomas-Whaley.pdf
    • http://muicuiu.dumb1.com/7a07a09a07a02a04/The-Vigilantes-of-Montana-by-Thomas-Josiah-Dimsdale.pdf
    • http://muicuiu.dumb1.com/1a04a07a09a03a04/Six-Months-in-Montana-Montana-Sweet-Western-Romance-1-by-Pamela-M-Kelley.pdf
    • http://muicuiu.dumb1.com/2a02a07a08a04a06/Montana-Rose-Montana-Marriages-1-by-Mary-Connealy.pdf
    • http://muicuiu.dumb1.com/5a01a06a08a04a03/Proceedings-of-the-Third-International-Workshop-on-Nude-Mice-Montana-State-University-Bozeman-Montana-September-6-9-1979-by-Norman-D-Reed.pdf
    • http://muicuiu.dumb1.com/4a01a04a04a01a02/Starry-Montana-Sky-Montana-Sky-2-by-Debra-Holland.pdf
    • http://muicuiu.dumb1.com/2a05a00a04a06a02/Healing-Montana-Sky-Montana-Sky-5-by-Debra-Holland.pdf
    • http://muicuiu.dumb1.com/4a01a04a04a01a04/Painted-Montana-Sky-Montana-Sky-3-5-by-Debra-Holland.pdf
    • http://muicuiu.dumb1.com/3a05a01a06a07a02/Noggin-by-John-Corey-Whaley.pdf
    • http://muicuiu.dumb1.com/3a09a08a01a00/Where-Things-Come-Back-by-John-Corey-Whaley.pdf
    • http://muicuiu.dumb1.com/2a06a06a07a01a04/Iron-Butterfly-A-Novel-of-Africa-by-Clara-Whaley-Perkins.pdf
    • http://muicuiu.dumb1.com/9a06a03a03a01/Come-Back-Strong-A-Widow-s-Song-by-Eileen-McGuire-Whaley.pdf
    • http://muicuiu.dumb1.com/1a01a09a09a00/Leaving-Paradise-Leaving-Paradise-1-by-Simone-Elkeles.pdf
    • http://muicuiu.dumb1.com/1a00a04a08a00a02a03/Germany-and-the-Holy-Roman-Empire-Volume-I-Maximilian-I-to-the-Peace-of-Westphalia-1493-1648-by-Joachim-Whaley.pdf
    • http://muicuiu.dumb1.com/4a02a05a02a01a01/The-Odd-Thomas-Series-4-Book-Bundle-Odd-Thomas-Forever-Odd-Brother-Odd-Odd-Hours-Odd-Thomas-1-4-by-Dean-Koontz.pdf
    • http://muicuiu.dumb1.com/2a02a07a00a02a04/Leaving-the-Sea-by-Ben-Marcus.pdf
    • http://muicuiu.dumb1.com/3a03a00a04a03a01/Leaving-Home-by-T-A-Chase.pdf
    • http://muicuiu.dumb1.com/2a08a05a00a00/The-Leaving-of-Things-by-Jay-Antani.pdf
    • http://muicuiu.dumb1.com/6a06a08a07a07a09/But-in-the-Fall-I-m-Leaving-by-Ann-Rinaldi.pdf

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