Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbeeb4091f36f68…

MALICIOUS

PDF

13.1 KB Created: 2019-04-30 04:58:38 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-14
MD5: 3b3136d5401f4cde7ee78359b277dee0 SHA-1: 3f4cb4bafac6b077edbae02707833079d8e7c521 SHA-256: 1cbeeb4091f36f681c61f6e2bdf382e791172b1adcb361af8e76fb3440b2c220
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 link farm. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also flagged this PDF as malicious, supporting the link farm heuristic.

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/7a05a04a04a07a05/Olikoye-by-Chimamanda-Ngozi-Adichie.pdf In PDF document text
    • http://muicuiu.dumb1.com/1a02a08a08a06a05/Americanah-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a04a01a06a02a09/A-Cor-do-Hibisco-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a04a01a05/Birdsong-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a05a08a09/Ofodile-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a04a01a04/You-in-America-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a00a01a06a05/Americanah-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a03a02a02/Americanah-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a06a08a03a08a07/Cell-One-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a03a00a01a01/Americanah-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a05a08a03/-2-Part-2-of-2-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a01a05a07a08/Half-of-a-Yellow-Sun-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a05a08a06/--1-Part-1-of-2-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a00a07a00a03a01/The-Thing-Around-Your-Neck-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a00a05a09a00/Half-of-a-Yellow-Sun-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a01a06a01a05/Purple-Hibiscus-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a06a06a02a08a07/Half-of-a-Yellow-Sun-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a06a00a01a07a02/Half-of-a-Yellow-Sun-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a06a01a07a00/Purple-Hibiscus-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a04a05a08a02/The-American-Embassy-by-Chimamanda-Ngozi-Adichie.pdfIn PDF document text

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