Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f38b12f0373c4cc…

MALICIOUS

PDF

16.0 KB Created: 2019-05-02 05:51:51 +01:00 Authoring application: mPDF 5.7
MD5: 1ed902aa954c4caab9c76d0ef574d500 SHA-1: bbc543ad620c8e687edfc471bf1b80eb0afa1ee3 SHA-256: 1f38b12f0373c4cce568d797b09849ddc9409153cc62dee30d37764d8bad4468
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links, identified as a PDF SEO link farm. The primary purpose appears to be to host numerous links to external PDF documents, likely for SEO manipulation or to distribute malicious content. No scripts were extracted from this sample, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://xiixmcuin.linkpc.net/5204204200200208/F-Scott-Fitzgerald-s-the-Great-Gatsby-by-Harold-Bloom.pdf
    • http://xiixmcuin.linkpc.net/4209202202208200/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/2209201208204207/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/1200205205204201202/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/2208209200207206/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/6206204200208203/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/7207201202200200/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/5204204200206205/The-Great-Gatsby-by-FITZGERALD-F-SCOTT.pdf
    • http://xiixmcuin.linkpc.net/7200207208206/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/7204200209201205/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/8205202208207209/The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/5204203207209200/Trimalchio-An-Early-Version-of-The-Great-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/6202200206201201/The-Last-Gatsby-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/4203208202201205/Gatsby-Girls-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/5204204201203204/The-Great-Gatsby-F-Scott-Fitzgerald-Anne-Crow-by-Anne-Crow.pdf
    • http://xiixmcuin.linkpc.net/5204203209201201/Before-Gatsby-The-First-Twenty-Six-Stories-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/5204203209200202/Cliffs-Notes-on-Fitzgerald-s-the-Great-Gatsby-by-Kate-Maurer.pdf
    • http://xiixmcuin.linkpc.net/7207202200201208/The-Curious-Case-of-Benjamin-Button-Brad-Pitt---Illustrated-with-movie-pictures---Francis-Scott-Fitzgerald-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/8202204208207208/F-Scott-Fitzgerald-Four-Pack---Benjamin-Button-This-Side-of-Paradise-The-Beautiful-and-Damned-The-Diamond-as-big-as-The-Ritz-Illustrated-by-Norman-Rockwell-by-F-Scott-Fitzgerald.pdf
    • http://xiixmcuin.linkpc.net/5204204201203208/The-Great-Gatsby-What-If-Gatsby-Was-a-Women-by-Mary-J-Greene.pdf
    • http://xiixmcuin.linkpc.net/6202200206201201/The-Last-Gatsby-by-F-Scott-

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