Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0a4d48aa60d507…

MALICIOUS

PDF

15.1 KB Created: 2019-05-03 09:17:09 +01:00 Authoring application: mPDF 5.7 First seen: 2021-08-20
MD5: d6dd846d1657546c1ec273f2934be587 SHA-1: f3e204e53c6a1d68903d0111a14048b244b9f715 SHA-256: fb0a4d48aa60d507fa9ce10e419542f103214f590bf69c3bd54f79a8ce931c7a
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 as a 'PDF_SEO_LINK_FARM' heuristic. While the document body is heavily obfuscated, the presence of a 'SE_DOWNLOAD_BUTTON' heuristic and numerous links suggests a lure to external content. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/4a09a02a00a06a02/Wolves-of-the-Witchwood-The-Impossible-Quest-2-by-Kate-Forsyth.pdf In PDF document text
    • http://muicuiu.dumb1.com/4a09a02a04a07a02/Battle-of-the-Heroes-The-Impossible-Quest-5-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a09a01a04a04a04/The-Beast-of-Blackmoor-Bog-The-Impossible-Quest-3-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a09a01a04a05a05/The-Drowned-Kingdom-The-Impossible-Quest-4-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a08a05a06a06a03/The-Wild-Girl-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a03a04a02a03/The-Puzzle-Ring-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a05a07a05a09a00/The-Wildkin-s-Curse-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a08a01a08a02a05/The-Cat-s-Eye-Shell-Chain-of-Charms-4-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a04a09a09a06/Dragonclaw-The-Witches-of-Eileanan-1-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a05a00a09a01a09/Two-Hours-The-Quest-to-Run-the-Impossible-Marathon-by-Ed-Caesar.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a08a01a08a02a07/The-Butterfly-in-Amber-Chain-of-Charms-6-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a04a03a00a06/The-Pool-of-Two-Moons-The-Witches-of-Eileanan-2-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a05a08a03a09a02/The-Butterfly-in-Amber-Chain-of-Charms-6-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a01a09a02a08/The-Silver-Horse-The-Chain-of-Charms-2-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a04a03a09a01/The-Forbidden-Land-The-Witches-of-Eileanan-4-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a08a01a06a09a07/The-Gypsy-Crown-Chain-of-Charms-1-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a04a03a05a00/The-Cursed-Towers-The-Witches-of-Eileanan-3-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a08a01a08a02a04/The-Herb-of-Grace-Chain-of-Charms-3-by-Kate-Forsyth.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a06a06a04/Fans-of-the-Impossible-Life-by-Kate-Scelsa.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a07a01a04a08/Facets-of-Night-Red-Cloud-Wolves-3-by-Kate-Steele.pdfIn PDF document text

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