Malicious PDF — malware analysis report

Static analysis result for SHA-256 409996e86c164907…

MALICIOUS

PDF

18.1 KB Created: 2019-04-30 06:34:47 +01:00 Authoring application: mPDF 5.7
MD5: cd9cb6f263b97ebc33c4266c2f837177 SHA-1: 3d044e06a9d2bc91c123a576c693a4f06c147e2e SHA-256: 409996e86c16490787d0a938a4a57e9005edeffa7407db942f2c6a66d52c7bf2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of external links, many pointing to PDFs hosted on the domain 'muicuiu.dumb1.com'. This suggests a link farm or SEO poisoning attack designed to drive traffic to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/9a02a05a02a06a02/Paper-Cuts-Tales-of-Horror-amp-Fantasy-by-Brian-Fatah-Steele.pdf
    • http://muicuiu.dumb1.com/9a02a05a03a02a08/Wetter-a-short-story-of-horror-by-Brian-Fatah-Steele.pdf
    • http://muicuiu.dumb1.com/9a02a05a02a05a08/Further-Than-Fate-five-tales-of-post-mythic-darkness-by-Brian-Fatah-Steele.pdf
    • http://muicuiu.dumb1.com/9a02a05a04a08a06/Your-Arms-Around-Entropy-by-Brian-Fatah-Steele.pdf
    • http://muicuiu.dumb1.com/9a02a05a03a03a01/These-Brewing-Abominations-an-Urban-Aeons-digital-short-by-Brian-Fatah-Steele.pdf
    • http://muicuiu.dumb1.com/1a01a06a06a04a03a00/How-to-Write-Tales-of-Horror-Fantasy-and-Science-Fiction-by-J-N-Williamson.pdf
    • http://muicuiu.dumb1.com/3a07a09a06a03/The-Unique-Legacy-of-Weird-Tales-The-Evolution-of-Modern-Fantasy-and-Horror-by-Justin-Everett.pdf
    • http://muicuiu.dumb1.com/4a07a04a02a09a08/Johnny-the-Mark-of-Chaos-An-Urban-Dark-Fantasy-Tazmark-Dark-Fantasy-Horror-Series-by-Susan-D-Kalior.pdf
    • http://muicuiu.dumb1.com/1a01a01a03a08a00/Thirteen-Tales-of-Horror-Point-Horror-13-s-by-T-Pines.pdf
    • http://muicuiu.dumb1.com/3a02a04a08a00a07/Rudyard-Kipling-s-Tales-of-Horror-and-Fantasy-by-Rudyard-Kipling.pdf
    • http://muicuiu.dumb1.com/4a03a09a05/Paper-Girls-Vol-2-Paper-Girls-2-by-Brian-K-Vaughan.pdf
    • http://muicuiu.dumb1.com/2a09a09a02/Paper-Girls-Vol-1-Paper-Girls-1-by-Brian-K-Vaughan.pdf
    • http://muicuiu.dumb1.com/2a05a08a04a04/Paper-Cities-An-Anthology-of-Urban-Fantasy-by-Ekaterina-Sedia.pdf
    • http://muicuiu.dumb1.com/2a04a05a00a09a00/The-Sentence-A-Chastity-Fetish-Fantasy-Steve-and-Anna-s-Fantasies-Book-1-by-SM-Steele.pdf
    • http://muicuiu.dumb1.com/8a08a09a08a09a02/Images-of-Horror-and-Fantasy-by-Gert-Schiff.pdf
    • http://muicuiu.dumb1.com/1a02a06a07a05a03/Y-The-Last-Man-Vol-7-Paper-Dolls-Y-The-Last-Man-7-by-Brian-K-Vaughan.pdf
    • http://muicuiu.dumb1.com/6a03a04a08a03/Paper-Girls-Book-One-by-Brian-K-Vaughan.pdf
    • http://muicuiu.dumb1.com/5a03a05a03a00a07/Demons-and-Dreams-Year-s-Best-Fantasy-and-Horror-Volume-2-by-Ellen-Datlow.pdf
    • http://muicuiu.dumb1.com/2a06a01a08a05/The-Year-s-Best-Fantasy-and-Horror-Thirteenth-Annual-Collection-by-Ellen-Datlow.pdf
    • http://muicuiu.dumb1.com/5a03a05a03a00a04/The-Year-s-Best-Fantasy-and-Horror-Eleventh-Annual-Collection-by-Ellen-Datlow.pdf
    • http://muicuiu.dumb1.com/4a07a04a

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