Malicious PDF — malware analysis report

Static analysis result for SHA-256 b345e660dadf3fe3…

MALICIOUS

PDF

14.6 KB Created: 2019-04-30 05:06:44 +01:00 Authoring application: mPDF 5.7
MD5: f592691a09f346760d075d7d650678d4 SHA-1: d2a2c23316d81a8cac33a2fe4e95197fa01cd122 SHA-256: b345e660dadf3fe3c832cd1bf34854e6dc29760e3fd0ef5abc5bcf5a33196a90
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on a dynamic DNS domain. This is indicative of a link farm or SEO poisoning attack, designed to drive traffic to malicious or misleading content. The ML classifier strongly supports the malicious verdict. 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 0.9891

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://loaminoo.linkpc.net/5092098096091091/The-Walrus-and-the-Elephants-John-Lennon-s-Years-of-Revolution-by-James-A-Mitchell.pdf
    • http://loaminoo.linkpc.net/4099097090094098/The-Songs-of-John-Lennon-The-Beatles-Years-by-John-Stevens.pdf
    • http://loaminoo.linkpc.net/5092098095096091/Lennon-on-Lennon-Conversations-with-John-Lennon-by-Jeff-Burger.pdf
    • http://loaminoo.linkpc.net/1090092097093094090/John-Lennon-In-Seiner-Eigenen-Schreibe-by-John-Lennon.pdf
    • http://loaminoo.linkpc.net/6095098091093/John-by-Cynthia-Lennon.pdf
    • http://loaminoo.linkpc.net/5092098095096092/Lennon-s-Jinx-Lennon-s-Girls-1-by-Chris-Myers.pdf
    • http://loaminoo.linkpc.net/1091099090096099/Lennon-s-Rain-Lennon-s-Girls-2-by-Chris-Myers.pdf
    • http://loaminoo.linkpc.net/5092098095096093/Lennon-s-Hope-Lennon-s-Girls-3-by-Chris-Myers.pdf
    • http://loaminoo.linkpc.net/1094096092095098/Lennon-s-Jinx-Lennon-s-Girls-1-by-Chris-Myers.pdf
    • http://loaminoo.linkpc.net/5092098095098097/John-Lennon-and-the-Jews-by-Ze-39-ev-Maghen.pdf
    • http://loaminoo.linkpc.net/5092098096092090/John-Lennon-by-Alan-Clayson.pdf
    • http://loaminoo.linkpc.net/4099098093097096/Memories-of-John-Lennon-by-Yoko-Ono.pdf
    • http://loaminoo.linkpc.net/5092098096095094/John-Lennon-The-Lost-Weekend-by-Pang.pdf
    • http://loaminoo.linkpc.net/5099093090096/Instamatic-Karma-Photographs-of-John-Lennon-by-May-Pang.pdf
    • http://loaminoo.linkpc.net/4094091095090094/John-Ono-Lennon-Volume-2-1967-1980-by-Ray-Coleman.pdf
    • http://loaminoo.linkpc.net/8097093090095099/Hammer-or-Anvil-Modern-Germany-and-Mitchell-Nazi-Revolution-Fourth-Edition-by-Herwig.pdf
    • http://loaminoo.linkpc.net/4094091091098096/Playboy-Interview-with-John-Lennon-and-Yoko-Ono-by-David-Sheff.pdf
    • http://loaminoo.linkpc.net/4097096095094094/The-Playboy-Interviews-with-John-Lennon-amp-Yoko-Ono-by-David-Sheff.pdf
    • http://loaminoo.linkpc.net/3093095091090098/Stephen-King-shot-John-Lennon-by-Steve-Lightfoot.pdf
    • http://loaminoo.linkpc.net/5092098096095091/Cynical-Idealist-A-Spiritual-Biography-of-John-Lennon-by-Gary-Tillery.pdf

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