Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f40cf40d329225d…

MALICIOUS

PDF

15.2 KB Created: 2019-04-30 04:29:43 +01:00 Authoring application: mPDF 5.7
MD5: afd4b678cb81056c63e9da2556657fb1 SHA-1: 33ad46773a37f503f6f19f87b533b35d83b4bfe5 SHA-256: 1f40cf40d329225d10baabc4e6b91b4bbfdcffcae9992cdadbda485b3dd9632e
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample, but the primary attack vector appears to be directing users to potentially malicious content via a large number of links.

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/3a05a02a09a09a09/Shifting-Reality-by-Patty-Jansen.pdf
    • http://muicuiu.dumb1.com/2a03a09a08a06a07/Fire-amp-Ice-Icefire-Trilogy-1-by-Patty-Jansen.pdf
    • http://muicuiu.dumb1.com/4a09a05a07a06a04/Cam-Jansen-and-the-Mystery-of-the-Television-Dog-Cam-Jansen-Mysteries-4-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/7a04a06a05a04a08/Patty-s-Summer-Days-Patty-Fairfield-4-by-Carolyn-Wells.pdf
    • http://muicuiu.dumb1.com/1a08a01a01a09a02/Cam-Jansen-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/1a04a05a06a08a07/Bittersweet-Hope-by-Ryann-Jansen.pdf
    • http://muicuiu.dumb1.com/9a00a03a04a01a06/Amaryllis-of-Hawaii-by-Marilyn-Jansen.pdf
    • http://muicuiu.dumb1.com/2a08a05a06a01a05/How-I-Became-a-Fearless-Woman-by-Pamela-Jansen.pdf
    • http://muicuiu.dumb1.com/7a09a09a01a01/The-Mystery-of-the-UFO-Cam-Jansen-Mysteries-2-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/2a00a08a05a02a09/The-Birthday-Mystery-Cam-Jansen-Mysteries-20-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/9a08a08a08a06a02/The-Mystery-of-the-Television-Dog-Cam-Jansen-Mysteries-4-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/1a06a00a07a06a07/Steel-Beneath-the-Skin-Aneka-Jansen-1-by-Niall-Teasdale.pdf
    • http://muicuiu.dumb1.com/9a00a04a08a07a01/Percy-s-Plan-Berkshires-Journal-Series-1-by-Paul-Jansen.pdf
    • http://muicuiu.dumb1.com/2a00a08a05a03a01/The-Mystery-of-the-Stolen-Diamonds-Cam-Jansen-Mysteries-1-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/4a05a02a02a01a01/The-Mystery-of-the-Gold-Coins-Cam-Jansen-Mysteries-5-by-David-A-Adler.pdf
    • http://muicuiu.dumb1.com/3a04a02a07a01a07/Someone-I-Used-to-Know-by-Patty-Blount.pdf
    • http://muicuiu.dumb1.com/1a02a04a00a05a07/TMI-by-Patty-Blount.pdf
    • http://muicuiu.dumb1.com/1a01a02a02a05a06/Just-Patty-by-Jean-Webster.pdf
    • http://muicuiu.dumb1.com/1a09a03a09a03a05/Mermaids-by-Patty-Dann.pdf
    • http://muicuiu.dumb1.com/1a00a09a01a07a06/Send-by-Patty-Blount.pdf

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