Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f2a0c62c5c68a8…

MALICIOUS

PDF

14.8 KB Created: 2019-05-02 07:36:38 +01:00 Authoring application: mPDF 5.7
MD5: 1532b7bc10a17c5984302954f1870eea SHA-1: 3121710ea4fa770dfeff747e6c0ac81aeb14f1ad SHA-256: 50f2a0c62c5c68a87608018775c7bb1fe05437d5d2adca928973465b74eb6b6f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged the PDF as malicious, the specific intent beyond link distribution is unclear due to the lack of executable scripts or exploitable content in the document body. The URLs themselves are not directly malicious but are part of a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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://cefasfese.4pu.com/2730734732737738/The-Ugly-Stepsister-Strikes-Back-The-Ugly-Stepsister-1-by-Sariah-Wilson.pdf
    • http://cefasfese.4pu.com/4734730734732732/The-Promposal-The-Ugly-Stepsister-2-by-Sariah-Wilson.pdf
    • http://cefasfese.4pu.com/8736736732736736/My-Life-as-the-Ugly-Stepsister-by-Juli-Alexander.pdf
    • http://cefasfese.4pu.com/1730732734731730/God-Still-Don-t-Like-Ugly-God-Don-t-Like-Ugly-2-by-Mary-Monroe.pdf
    • http://cefasfese.4pu.com/2732732738737731/Confessions-of-an-Ugly-Girl-Ugly-Girl-Series-1-by-Alice-Wasser.pdf
    • http://cefasfese.4pu.com/1730732737737731739/The-Uglydoll-Ugly-Guide-to-the-Uglyverse-Ugly-Guide-1-by-David-Horvath.pdf
    • http://cefasfese.4pu.com/3734731736739730/Stepsister-by-Rachel-Kiss.pdf
    • http://cefasfese.4pu.com/1734736736732739/The-Stepsister-by-Trisha-Grace.pdf
    • http://cefasfese.4pu.com/2734734739733733/My-Futanari-Stepsister-by-James-Oenemal.pdf
    • http://cefasfese.4pu.com/1730732737737737732/The-Uglydoll-Ugly-Guide-to-Things-That-Go-and-Things-That-Should-Go-But-Don-t-Ugly-Guide-2-by-David-Horvath.pdf
    • http://cefasfese.4pu.com/2731730732738733/Servant-to-a-King-by-Sariah-S-Wilson.pdf
    • http://cefasfese.4pu.com/2735739737731730/Double-Ugly-by-Jim-Murray.pdf
    • http://cefasfese.4pu.com/1731732733735731/Beyond-Ugly-by-Constance-Briscoe.pdf
    • http://cefasfese.4pu.com/2737738730731/The-Ugly-Vegetables-by-Grace-Lin.pdf
    • http://cefasfese.4pu.com/1734732738739739/Ugly-by-Robert-Hoge.pdf
    • http://cefasfese.4pu.com/1739735730735732/Ugly-by-Margaret-McHeyzer.pdf
    • http://cefasfese.4pu.com/2734730738730731/The-Good-the-Bad-And-the-Ugly-by-Joe-Millard.pdf
    • http://cefasfese.4pu.com/3735731734732734/Pitifully-Ugly-by-Robin-Alexander.pdf
    • http://cefasfese.4pu.com/7737739735735/God-Don-t-Play-God-Don-t-Like-Ugly-3-by-Mary-Monroe.pdf
    • http://cefasfese.4pu.com/2730739737732737/Ugly-Love-by-Colleen-Hoover.pdf
    • http://cefasfese.4pu.com/2731730732738733/Servant-to-a-King-by-Sariah-S-Wilson.pd

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