Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dd3856ff4c7203…

MALICIOUS

PDF

15.6 KB Created: 2019-04-30 04:58:00 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-17
MD5: cc419b3c49cecda6ff066e80e415acda SHA-1: 85b1c63e710234f565f05be4fa35256c870bb16b SHA-256: c5dd3856ff4c7203390cb6f6b7912ff015be4465fb20c7b940cc63b07dd66ea0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDF files, a technique often used to obscure malicious intent or distribute further payloads. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure reinforces the suspicious nature of the document. While no scripts were directly extracted, the structure suggests an attempt to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/2a06a04a01a01a00/Poems-of-the-Past-and-the-Present-by-Thomas-Hardy.pdf In PDF document text
    • http://muicuiu.dumb1.com/6a01a05a00a03a06/Present-Past-Past-Present-by-Eug-ne-Ionesco.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a01a06a01a01a09/Past-is-Present-quot-Jurassic-Jim-quot-Fleetwood-2-by-Thomas-Davidson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a04a01a08a06a02/Perle-by-Thomas-Carlyle-McCarthy.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a02a05a08a03a08/The-Life-of-Friedrich-Schiller-by-Thomas-Carlyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a01a00a09a07a00/Past-amp-Present-Collide-by-Amanda-Kay.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a05a07a04a03a00/When-Past-Comes-to-Present-Beckett-Investigations-1-by-R-G-Green.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a09a02a02a09a09/Past-Present-and-Murder-by-Hugh-Pentecost.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a01a06a03a00a00/Leadership-Past-Present-amp-Future-by-Carlos-Rivera.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a06a00a05a01/All-the-Rage-The-Boondocks-Past-and-Present-by-Aaron-McGruder.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a08a05a06a09a02/Columbus-Past-Present-and-Future-by-Brad-Pauquette.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a07a07a06a05/The-Mayan-Culture-Past-and-Present-by-Gary-Wonning.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a03a00a01a02a03/Sartor-Resartus-the-life-and-opinions-of-Herr-Teufelsdr-ckh-by-Thomas-Carlyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a02a07a03a04/The-Republican-Option-in-Canada-Past-and-Present-by-David-E-Smith.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a08a02a00a03a06/Global-Studies-Civilizations-of-the-Past-and-Present-R-458-W-by-Henry-Brum.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a04a01a02a07/The-London-Colouring-Book-Past-and-Present-by-The-History-Press.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a08a05a07a09a05/Hip-Hop-Apsara-Ghosts-Past-and-Present-by-Anne-Elizabeth-Moore.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a02a04a08a05a09/Wild-Dogs-Past-amp-Present-by-Kelly-Milner-Halls.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a06a08a08a03a07/Heart-of-Europe-The-Past-in-Poland-s-Present-by-Norman-Davies.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a02a02a04a07/The-Tiber-and-the-Thames-Their-Associations-Past-and-Present-by-Sarah-Butler-Wister.pdfIn PDF document text