Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6905eb3e949b6ff…

MALICIOUS

PDF

16.5 KB Created: 2019-04-30 04:04:04 +01:00 Authoring application: mPDF 5.7
MD5: b36bd178e77a9b179a119f37c7f35cfe SHA-1: 68cbfea9f15b02e4bb8eccdfe240841de10bdab3 SHA-256: d6905eb3e949b6ff07bbdd86711d0b3f321944f45c66c5d7b12a71d369cdcf56
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. While the ML classifier flagged this PDF as malicious with high confidence, no specific malicious script or payload was directly extracted. The embedded URLs, though many are marked as benign, point to a domain that hosts numerous PDF files, indicating a potential distribution or redirection mechanism. The attack pattern likely involves luring users to click these links, which could lead to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 2

  • 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.
  • 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/1a07a08a06a04a01/Painted-Blind-by-Michelle-A-Hansen.pdf
    • http://muicuiu.dumb1.com/2a06a01a00a00a04/Cupid-s-Enchantment-Naughty-Cupid-1-by-Michelle-M-Pillow.pdf
    • http://muicuiu.dumb1.com/9a05a09a04a00/Cupid-s-Last-Stand-The-Cupid-Chronicles-4-by-Shauna-Allen.pdf
    • http://muicuiu.dumb1.com/3a01a00a08a07a02/Down-With-Cupid-Down-With-Cupid-Shorts-4-by-Melissa-Blue.pdf
    • http://muicuiu.dumb1.com/2a00a04a05a06a04/The-Painted-Heart-The-Painted-Sisters-0-5-The-Velvet-Basement-3-by-Elsa-Holland.pdf
    • http://muicuiu.dumb1.com/7a02a09a06a05/The-Painted-Heart-The-Painted-Sisters-0-5-The-Velvet-Basement-3-by-Elsa-Holland.pdf
    • http://muicuiu.dumb1.com/8a08a02a07a08a08/A-Job-For-An-Angel-Schulte-Elaine-L-Ginger-Series-by-Elaine-L-Schulte.pdf
    • http://muicuiu.dumb1.com/3a07a03a08a05a03/Koi-Cupid-Vol-1-Koi-Cupid-1-by-Mia-Ikumi.pdf
    • http://muicuiu.dumb1.com/1a08a08a04a06a04/Blind-Descent-Surviving-Alone-and-Blind-on-Mount-Everest-by-Brian-Dickinson.pdf
    • http://muicuiu.dumb1.com/1a09a06a05a05/Blind-Faith-Blind-Eye-3-by-Diane-Anderson-Minshall.pdf
    • http://muicuiu.dumb1.com/2a08a09a09a05/Painted-Faces-Painted-Faces-1-by-L-H-Cosway.pdf
    • http://muicuiu.dumb1.com/2a04a03a03a07a09/Blind-Sight-Through-the-Eyes-of-Aniela-Dawson-Blind-Sight-1-Aniela-by-Eliabeth-Hawthorne.pdf
    • http://muicuiu.dumb1.com/5a04a05a09a02a08/Blind-Sight-Through-the-Eyes-of-Leocardo-Reyes-Blind-Sight-1-Leocardo-by-Ermisenda-Alvarez.pdf
    • http://muicuiu.dumb1.com/2a00a07a08a00a05/Cupid-s-Armorer-by-Ken-Haramiru.pdf
    • http://muicuiu.dumb1.com/4a00a08a07a04a02/Dating-Cupid-by-Eve-Langlais.pdf
    • http://muicuiu.dumb1.com/1a07a01a05a03a02/Blind-Date-Blind-Date-1-by-Violette-Paradis.pdf
    • http://muicuiu.dumb1.com/1a03a05a01a00a07/The-Cupid-Effect-by-Dorothy-Koomson.pdf
    • http://muicuiu.dumb1.com/5a08a03a09a00a08/Step-on-it-Cupid-by-Lorelei-Mathias.pdf
    • http://muicuiu.dumb1.com/4a09a01a01a00a07/Killing-Cupid-by-Louise-Voss.pdf
    • http://muicuiu.dumb1.com/4a04a04a06a03a09/Pucker-Up-Stupid-Cupid-3-by-Rhonda-Stapleton.pdf

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