Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51354319431f72e…

MALICIOUS

PDF

13.0 KB Created: 2019-04-30 04:08:27 +01:00 Authoring application: mPDF 5.7 First seen: 2021-08-20
MD5: 212ab30a399f9c18e5d34f5dcc51ee14 SHA-1: 61c16b0f0bb502c034b8847e2d0c6861de60aebf SHA-256: b51354319431f72e1ff01fc11604364b280c6ba63e7b8439d76ec8b80d20f0f4
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. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of a link farm and the ML detection suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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/5a00a04a05/Till-Death-by-Jennifer-L-Armentrout.pdf In PDF document text
    • http://muicuiu.dumb1.com/2a02a00a03/Oblivion-Lux-1-5-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a05a05a06a09/Don-t-Look-Back-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a08a03a03a02a04/Shadows-Lux-0-5-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a04a05a02/Obsession-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a09a04a01a03a05/Onyx-Lux-2-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a03a06a03/Shadows-Lux-0-5-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a05a02a09a05a05/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a09a07a02a02a00/Obsession-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a03a00a01a09/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a05a01a00a05a08/Cursed-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a05a00a09a08a01/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a05a02a07/Daimon-Covenant-0-5-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a09a03a01a06a08/The-Proposal-Wait-for-You-2-5-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a00a06a00a09/Fall-with-Me-Wait-for-You-4-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a03a03a02a08/Deity-Covenant-3-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a05a03a01a04a06/Apollyon-Covenant-4-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a08a06a06a01/The-Problem-with-Forever-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a05a03a01a04a03/Deity-Covenant-3-by-Jennifer-L-Armentrout.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a03/The-Return-Titan-1-by-Jennifer-L-Armentrout.pdfIn PDF document text

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