Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26f8b389c60ba35…

MALICIOUS

PDF

24.0 KB Created: 2019-05-01 05:13:14 +01:00 Authoring application: mPDF 5.7 First seen: 2021-07-10
MD5: b34914c225bae345573a285c70802794 SHA-1: 369dbb90ad2f314e26872d0d0b3813ba24c97a9a SHA-256: e26f8b389c60ba3502f609e9fca27e1b68eb0c2c7fd09bd1e739189048631500
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to direct users to external content, potentially for SEO manipulation or to host malicious payloads. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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/1a02a03a05a00a06/Cream-of-the-Crop-Hudson-Valley-2-by-Alice-Clayton.pdf In PDF document text
    • http://muicuiu.dumb1.com/1a08a03a00/Nuts-Hudson-Valley-1-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a02a00a03a09a04/Mai-Tai-d-Up-Cocktail-4-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a04a01a08a02/Mai-Tai-d-Up-Cocktail-4-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a02/Last-Call-Cocktail-4-5-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a05a09a04a06/Screwdrivered-Cocktail-3-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a03a00a02a07a00/Adele-by-Alice-Hudson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a05a05a01a07a06/Biological-Control-Introductions-Opportunities-For-Improved-Crop-Production-Proceedings-Of-An-International-Symposium-Organised-By-The-British-Crop-Protection-Council-And-Held-At-The-Brighton-Metropole-Hotel-On-18-November-1996-by-J-K-Waage.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a06a08a07a08a04/Hudson-Valley-Ruins-Forgotten-Landmarks-of-an-American-Landscape-by-Thomas-Rinaldi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a08a06a02a02a05/Clayton-Kershaw-The-Inspirational-Story-of-Baseball-Superstar-Clayton-Kershaw-Clayton-Kershaw-Unauthorized-Biography-Los-Angeles-Dodgers-MLB-Books-by-Bill-Rogan.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a01a02a02a04a08/Big-Gay-Ice-Cream-Saucy-Stories-amp-Frozen-Treats-Going-All-the-Way-with-Ice-Cream-by-Bryan-Petroff.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a00a08a02a01a03/The-Riding-Crop-Riding-Crop-1-by-Karyn-Gerrard.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a00a09a08a04a07/A-Riding-Crop-for-Two-Riding-Crop-2-by-Karyn-Gerrard.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a05a06a08/The-Unidentified-Redhead-Redhead-1-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a05a02a01a07a08/The-Unidentified-Redhead-Redhead-1-by-Alice-Clayton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a05a00a00a03a04/Valley-of-the-Moon-The-Diary-of-Mar-a-Rosal-a-de-Milagros-Sonoma-Valley-Alta-Valley-California-1846-by-Sherry-Garland.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a08a06a02a00a00/Clayton-Kershaw-The-Inspirational-Story-of-Baseball-Superstar-Clayton-Kershaw-by-Bill-Redban.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a00a03a02a07/Grizzlies-White-Guys-The-Stories-of-Clayton-Mack-by-Clayton-Mack.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a03a06a00a01a03/Kiera-Hudson-amp-The-Girl-Who-Travelled-Backward-Kiera-Hudson-Series-Four-Book-1-by-Tim-O-39-Rourke.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a09a04a00a09a09/Alice-Aventuras-de-Alice-no-Pa-s-das-Maravilhas-amp-Atrav-s-do-Espelho-e-o-Oue-Alice-Encontrou-Por-L-by-Lewis-Carroll.pdfIn PDF document text

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