Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa85840bdc5cfd50…

MALICIOUS

PDF

22.2 KB Created: 2019-04-30 03:32:54 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-13
MD5: 50917e1958c03a86cb8116b199e70791 SHA-1: 1947819357d099b37893a0667e62a4a228598278 SHA-256: aa85840bdc5cfd50024e341ee11a5624a18ececd7563bed425eab7a0fdbae2d2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search engine results or direct users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/3a03a00a05a00a05/Blink-The-Power-of-Thinking-Without-Thinking-by-Malcolm-Gladwell.pdf In PDF document text
    • http://muicuiu.dumb1.com/2a03a08a03a00a00/Blink-The-Power-of-Thinking-Without-Thinking-by-Malcolm-Gladwell.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a03a05a03a02/Blink-The-Power-of-Thinking-Without-Thinking-by-Malcolm-Gladwell.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a08a04a01a08a06/Remove-Negative-Thinking-How-to-Instantly-Harness-Mindfulness-and-The-Power-of-Positive-Thinking-The-GirlBizMind-Series-Book-1-by-Helga-Klopcic.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a02a08a03a09/Summary-of-Blink-by-Malcolm-Gladwell-Includes-Analysis-by-Elite-Summaries.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a00a07a08a08/30-Days-to-Better-Thinking-and-Better-Living-Through-Critical-Thinking-A-Guide-for-Improving-Every-Aspect-of-Your-Life-by-Linda-Elder.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a09a04a02a09/Predatory-Thinking-A-Masterclass-in-Out-Thinking-the-Competition-by-Dave-Trott.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a03a02a00a02/Positive-thinking-Eliminate-negative-thinking-and-become-optimistic-Achieve-happiness-amp-success-by-improving-your-mind-set-and-building-confidence-by-George-Ripley.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a02a01a03a02a03/The-Art-of-Thinking-Clearly-Better-Thinking-Better-Decisions-by-Rolf-Dobelli.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a03a03a06a03/Positive-Thinking-The-Secret-To-Positive-Thinking---Create-Your-Own-Abundant-Happy-And-Wealthy-Life-by-Sarah-Riedel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a00a05a07a07/The-Ultimate-Power-of-Positive-Thinking-by-Stephen-Richards.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a08a01a03a01a09/Humboldt-Or-the-Power-of-Positive-Thinking-by-Scott-Navicky.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a09a03a02a02a08/Positive-Thinking-Everything-you-have-always-known-about-positive-thinking-but-were-afraid-to-put-into-practice-by-Vera-Peiffer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a03a04a00a00a01/Discovering-the-Power-of-Positive-Thinking-by-Norman-Vincent-Peale.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a01a00a09a05/Thinking-Anew-Harnessing-the-Power-of-Belief-by-Eugene-F-Moynihan-Jr-.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a02a06a04a05a06/Brain-Power-Learn-to-Improve-Your-Thinking-Skills-by-Karl-Albrecht.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a01a00a06a09a04/El-Poder-Del-Pensamiento-Tenaz-The-Power-of-Positive-Thinking-by-Norman-Vincent-Peale.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a02a04a01a06a06/The-Power-of-Positive-Thinking-10-Traits-for-Maximum-Results-by-Norman-Vincent-Peale.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a09a05a07a02a05/Mind-Power-Change-Your-Thinking-Change-Your-Life-by-James-Borg.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a01a02a06a01a08/What-the-Dog-Saw-And-Other-Adventures-by-Malcolm-Gladwell.pdfIn PDF document text

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