Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7aa02ee45addb5…

MALICIOUS

PDF

15.2 KB Created: 2019-05-07 04:42:31 +01:00 Authoring application: mPDF 5.7
MD5: d3c43fac95f284a77c77e1f2b7c0da5f SHA-1: 919d209a1d4ab7e30127916ab26d2d302312520f SHA-256: 2b7aa02ee45addb5c0144faa34fb2c85ba627dbc38ae021b522c95fbdf5d2f1e
90 Risk Score

Malware Insights

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

The sample is a PDF document that contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged it as malicious, the majority of the extracted URLs are marked as confirmed benign. The document body is heavily corrupted, preventing analysis of its specific content or intent. The primary attack pattern appears to be the creation of a link farm, potentially for SEO manipulation or to serve as a distribution point for other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/2a00a09a07a02/Hidden-in-a-Heartbeat-A-Place-Called-Home-3-by-Patricia-McLinn.pdf
    • http://muicuiu.dumb1.com/2a07a06a08a04a05/The-Long-Road-Home-A-Place-Called-Home-3-by-Lori-Wick.pdf
    • http://muicuiu.dumb1.com/7a04a09a07a09a02/A-Place-Called-Home-by-Dilly-Court.pdf
    • http://muicuiu.dumb1.com/6a01a03a08a07a03/A-Place-Called-Home-The-Social-Dimensions-of-Homeownership-by-Kim-R-Manturuk.pdf
    • http://muicuiu.dumb1.com/3a03a03a02a07a07/A-Place-Called-Home-Tales-From-Foster-High-5-5-by-John-Goode.pdf
    • http://muicuiu.dumb1.com/3a08a09a02a04a07/Place-Called-Home-The-Potter-s-House-Books-11-by-Brenda-S-Anderson.pdf
    • http://muicuiu.dumb1.com/4a05a03a09a06/A-Place-Called-Home-Writings-On-The-Midwestern-Small-Town-by-Richard-O-Davies.pdf
    • http://muicuiu.dumb1.com/5a00a09a01a05/A-Place-to-Claim-as-Home-by-Patricia-Willis.pdf
    • http://muicuiu.dumb1.com/5a00a03a01a04a09/The-Heart-of-Christmas-by-Patricia-McLinn.pdf
    • http://muicuiu.dumb1.com/6a08a09a03a02a04/Flores-silvestres-de-Wyoming-El-principio-Novela-corta-by-Patricia-McLinn.pdf
    • http://muicuiu.dumb1.com/1a00a05a08a01a01a03/Prelude-to-a-Wedding-Wedding-1-by-Patricia-McLinn.pdf
    • http://muicuiu.dumb1.com/1a04a09a09a06a00/A-Place-Called-Freedom-by-Ken-Follett.pdf
    • http://muicuiu.dumb1.com/2a04a09a07a02a02/A-Place-Called-Winter-by-Patrick-Gale.pdf
    • http://muicuiu.dumb1.com/8a01a05a06a07a06/A-Place-Called-the-Bla-Bla-Cafe-by-Sandy-Ross.pdf
    • http://muicuiu.dumb1.com/9a00a03a08a08a06/A-Place-Called-Freedom-Audible-by-Ken-Follett.pdf
    • http://muicuiu.dumb1.com/7a03a02a03a01/Heartbeat-Heartbeat-1-by-Faith-Sullivan.pdf
    • http://muicuiu.dumb1.com/3a08a03a08a00/Moon-Called-Mercy-Thompson-1-by-Patricia-Briggs.pdf
    • http://muicuiu.dumb1.com/7a07a05a06a07a00/A-Star-Called-Home-by-Marina-Landry.pdf
    • http://muicuiu.dumb1.com/5a05a04a08a09a04/A-Dream-Called-Home-by-Reyna-Grande.pdf
    • http://muicuiu.dumb1.com/3a00a03a08a01a00/Patricia-Briggs-Mercy-Thompson-Moon-Called-Volume-2-by-David-Lawrence.pdf
    • http://muicuiu.dumb1.com/5a00a03a0

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