Malicious PDF — malware analysis report

Static analysis result for SHA-256 12460809dc50e3ad…

MALICIOUS

PDF

16.4 KB Created: 2019-04-30 02:44:59 +01:00 Authoring application: mPDF 5.7
MD5: 45062a796149e5ec79507d994b201ab7 SHA-1: 32ec1839033462d0ec7d52a987a2e0252fde5c39 SHA-256: 12460809dc50e3ad8af6521b6c79d617b7dea9a754820798bf59dc6ced77b2af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, identified as a 'PDF_SEO_LINK_FARM' heuristic. This technique is often used to distribute malware or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the link farm suggests a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 4

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9622800-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9622800-0
  • 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/4a03a09a02a06a01/Re-Vamped-My-Sister-the-Vampire-3-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/1a00a02a02a08a01/Re-Vamped-My-Sister-the-Vampire-Series-3-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/2a09a05a06a02a06/Take-Two-My-Sister-the-Vampire-5-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a06a07a06a05a06/Stake-Out-My-Sister-The-Vampire-12-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/2a00a03a08a00a08/Bite-Night-My-Sister-the-Vampire-10-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a07a04a00a07a03/Flying-Solo-My-Sister-the-Vampire-11-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a07a04a00a07a04/My-Sister-The-Vampire-Collection-Take-Two-Vampalicious-Revamped-Fangtastic-Switched-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a05a02a08a09a04/Tail-Spin-My-Brother-the-Werewolf-4-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/4a05a00a00a01a05/Puppy-Love-My-Brother-the-Werewolf-2-by-Sienna-Mercer.pdf
    • http://muicuiu.dumb1.com/1a00a07a01a00a05a05/Karen-s-Big-Sister-Baby-Sitters-Little-Sister-69-by-Ann-M-Martin.pdf
    • http://muicuiu.dumb1.com/4a09a09a01a00a03/Karen-s-Little-Sister-Baby-Sitters-Little-Sister-6-by-Ann-M-Martin.pdf
    • http://muicuiu.dumb1.com/1a00a07a08a00a09a00/Sister-Sister-by-Eric-Jerome-Dickey.pdf
    • http://muicuiu.dumb1.com/4a04a01a09a00a02/Shout-Sister-Shout-The-Untold-Story-of-Rock-and-Roll-Trailblazer-Sister-Rosetta-Tharpe-by-Gayle-Wald.pdf
    • http://muicuiu.dumb1.com/8a05a07a06a02/Sister-Pelagia-and-the-White-Bulldog-Sister-Pelagia-Mysteries-1-by-Boris-Akunin.pdf
    • http://muicuiu.dumb1.com/1a00a07a09a07a03a07/Oz-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/1a08a06a02a09a02/The-Oaf-Prince-by-Sienna-Sway.pdf
    • http://muicuiu.dumb1.com/1a02a09a09a00a00/Before-Sunrise-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/2a05a00a06a06a03/The-Accidental-Mistress-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/2a04a09a01a08a04/Taming-the-Scotsman-by-Sienna-Mynx.pdf
    • http://muicuiu.dumb1.com/3a06a00a07a00a05/Burnt-Sienna-by-David-Morrell.pdf

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