Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb08ae0e3a7dcf8d…

MALICIOUS

PDF

15.6 KB Created: 2019-04-30 02:57:25 +01:00 Authoring application: mPDF 5.7 First seen: 2021-08-20
MD5: d619342092e2eee681dea14ff25f5ebc SHA-1: 36b6933ef0b1ce36dad42ad16b3c6e1d8fca8695 SHA-256: fb08ae0e3a7dcf8d4f0c0cb69cca28c47801de0d3ef5df650503dd55e75a5065
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, presented as a link farm. This heuristic, combined with the ML classifier's high confidence, suggests the document is designed to redirect users to potentially malicious content. Although no scripts were extracted, the structure and embedded URLs indicate a phishing or malware distribution attempt.

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/4a05a03a09a09a01/Sophie-Signature-Sweethearts-5-by-Kelsie-Rae.pdf In PDF document text
    • http://muicuiu.dumb1.com/3a05a07a01a00a00/Sweethearts-of-Rhythm-by-Marilyn-Nelson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a00a02a08a08a06/Sweethearts-and-Wives-Regiment-2-by-C-L-Skelton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a08a04a05a06/Wyoming-Sweethearts-Granger-Family-Ranch-6-by-Jillian-Hart.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a03a08a09a07/Stories-of-Warriors-and-Sweethearts-at-the-Holy-Crusade-by-Folco-Zanobini.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a06a08a04a08a03/The-Last-of-the-Doughboys-The-Forgotten-Generation-and-Their-Forgotten-World-War-by-Richard-Rubin.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a09a08a01a02a06/Better-Left-Forgotten-Forgotten-1-by-Lisa-Helen-Gray.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a01a09a06a00/Bender-by-Gene-Gant.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a04a07a09a06/Refund-by-Karen-E-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a07a02a08a04/Three-Men-on-a-Bender-by-Patrick-Rossi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a04a00a01a02/Giraffe-and-Bird-by-Rebecca-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a02a09a02a09/An-Invisible-Sign-of-My-Own-by-Aimee-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a01a07a04a09/An-Invisible-Sign-of-My-Own-by-Aimee-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a08a00a09a04a04/I-Am-the-Elephant-in-the-Room-by-Jack-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a00a02a09a09a01/Crashed-Junior-Bender-1-by-Timothy-Hallinan.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a02a09a04a01a03/The-Particular-Sadness-of-Lemon-Cake-by-Aimee-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a04a00a02a07a09/Grace-at-Bender-Springs-by-Vinita-Hampton-Wright.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a01a06a00a09/A-Golden-Sunbeam-Miriam-s-Journal-5-by-Carrie-Bender.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a09a02a03a00a07/Herbie-s-Game-Junior-Bender-4-by-Timothy-Hallinan.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a08a07a01a00a03/Melody-of-My-Heart-Johanna-s-Journal-1-by-Carrie-Bender.pdfIn PDF document text