Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e61f02808bf35db…

MALICIOUS

PDF

20.2 KB Created: 2019-05-07 04:40:30 +01:00 Authoring application: mPDF 5.7
MD5: ea31d380729448b486a720606ba9f69b SHA-1: dbccd30e766dca95cc5a81b59ebf42f4103c7e35 SHA-256: 5e61f02808bf35db48797ca334b8be7105d4398e764f2fcac1ed0115b28cae34
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, masquerading as book titles, which is indicative of a link farm designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading further payloads, likely via JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/4a09a01a02a06a02/A-Study-in-Scarlet-and-The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/7a05a01a01a09a06/A-Study-in-Scarlet-amp-The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a08a01a02a02a02/A-Study-in-Scarlet-and-The-Sign-of-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/9a00a02a04a05a01/A-Study-in-Scarlet-Illustrated-by-Nis-Jessen-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/9a04a00a01a09/A-Study-in-Scarlet-The-Hound-of-the-Baskervilles-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/5a05a04a04a02a05/A-study-in-scarlet-With-a-note-on-Sherlock-Holmes-by-Joseph-Bell-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a07a06a00a08a05/A-study-in-scarlet-Eine-Studie-in-Scharlachrot-Sherlock-Holmes-ermittelt-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/5a02a05a02a03a07/A-Study-In-Scarlet-Parallel-Text-English-French-Edition-Un-Crime-trange-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a04a08a01a09a09/A-Study-in-Scarlet-GCSE-English-Illustrated-Student-Edition-with-Wide-Annotation-Friendly-Margins-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/9a08a05a02a05a08/The-Adventures-of-Sherlock-Holmes-by-Sir-Arthur-Conan-Doyle-Illustrated-Delphi-Parts-Edition-Sir-Arthur-Conan-Doyle-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a05a06a09a05a00/A-Study-in-Scarlet-Introducing-Sherlock-Holmes-The-Sherlock-Holmes-Collection-Volume-1-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a02a02a01a02a07/Sir-Arthur-Conan-Doyle-s-The-Adventures-of-Sherlock-Holmes-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a08a05a06a04a09/The-Exploits-of-Brigadier-Gerard-by-Arthur-Conan-Doyle-and-W-B-Wollen-amp-the-Adventures-of-Gerard-Illustrated-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a03a02a04a00a02/Arthur-Conan-Doyle-quot-Die-verlorene-Welt-quot-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/9a05a04a04a09a08/Doyle---Sherlock-Holmes---Gesammelte-Werke-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a02a09/The-Sign-of-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/6a00a01a05a02a04/The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/1a00a04a09a06a03a03/The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/4a05a00a09a08a08/The-Man-With-the-Twisted-Lip-by-Arthur-Conan-Doyle.pdf
    • http://muicuiu.dumb1.com/2a08a01a05a09a09/The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf

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