Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c2eb77e959cdd8…

MALICIOUS

PDF

11.7 KB Created: 2019-04-30 02:32:17 +01:00 Authoring application: mPDF 5.7 First seen: 2021-07-13
MD5: 5ac8660e44c8abe536ba673036dee558 SHA-1: 8d44ae003afaff7ef3e04698a0a9931336f52e18 SHA-256: e5c2eb77e959cdd8f9fc981835f1c1d2b895c32f512e43375bf4c611e5b4e91f
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, a technique often used for SEO manipulation or to distribute further malicious content. While the ML classifier flagged it as malicious, the specific intent beyond link farming is unclear due to the lack of executable scripts or clear malicious document body text. The presence of a 'download button' heuristic suggests a potential lure, but the primary observed behavior is the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8737

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/4a00a09a01a03a08/H-R-H-by-Danielle-Steel.pdf In PDF document text
    • http://muicuiu.dumb1.com/4a00a09a05a03a02/Summer-s-End-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a08a08a07a05/Star-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a09a03a03a06/Rogue-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a03a05a06a09/Granny-Dan-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a05a01a06a03a01/Zoya-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a07a01a08a08/To-Love-Again-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a01a06a08a00/The-Promise-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a09a02a09a01/Remembrance-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a04a04a03a08/Sisters-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a04a02a02a01a04/The-Award-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a06a09a05/Against-All-Odds-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a03a03a03a03/The-Ghost-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a00a09a04/The-Cast-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a06a03a04a07/Against-All-Odds-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a02a05a04/The-Right-Time-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a00a04a02a07a08/The-Gift-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a07a06a05a09/The-Kiss-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a08a03a04a01a04/Once-in-a-Lifetime-by-Danielle-Steel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a01a03a05a01/Impossible-by-Danielle-Steel.pdfIn PDF document text

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