Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5988082a88eda26…

MALICIOUS

PDF

14.6 KB Created: 2019-11-07 12:33:23 +00:00 Authoring application: mPDF 5.7
MD5: c77fe7abb4fbc2987501562895f6035a SHA-1: 72dd0ccfff94ebb8ae28d5ae9aa0e7385fbcca79 SHA-256: a5988082a88eda262055437f8166457af5e7267b28ba42c954fc51281de6a386
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to a single domain, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged the document as malicious, the specific intent appears to be a link farm rather than direct payload delivery. The document body is heavily obfuscated, but the URLs themselves are clearly visible and represent the primary IOCs. No scripts were extracted from this sample.

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/7735734733735735/Fichtes-Wissenschaftslehre-of-1794-by-George-J-Seidel.pdf
    • http://cefasfese.4pu.com/1733730730738/Maybe-This-Time-by-Kathleen-Gilles-Seidel.pdf
    • http://cefasfese.4pu.com/7735736739734734/The-Cosmos-Poems-by-Frederick-Seidel.pdf
    • http://cefasfese.4pu.com/3732734736732734/Summer-s-End-by-Kathleen-Gilles-Seidel.pdf
    • http://cefasfese.4pu.com/7735736739734737/Art-amp-Architecture-Egypt-by-Matthias-Seidel.pdf
    • http://cefasfese.4pu.com/7735737730733730/Final-Solutions-by-Frederick-Seidel.pdf
    • http://cefasfese.4pu.com/7735736737735739/Nice-Weather-Poems-by-Frederick-Seidel.pdf
    • http://cefasfese.4pu.com/8736730738732737/Nachtschatten-Reihe-in-4-B-nden-by-Juliane-Seidel.pdf
    • http://cefasfese.4pu.com/9731734733732/Mirrors-and-Mistakes-by-Kathleen-Gilles-Seidel.pdf
    • http://cefasfese.4pu.com/9735733730736737/So-spricht-Mecklenburg-Vorpommern-by-J-rgen-Seidel.pdf
    • http://cefasfese.4pu.com/7735734734736737/State-of-France-in-May-1794-by-Maurice-Montgaillard.pdf
    • http://cefasfese.4pu.com/7735734734736731/1794-Book-of-Prayer-by-Arthur-S-Martinson.pdf
    • http://cefasfese.4pu.com/7735736738730730/Hip-Hop-Genius-Remixing-High-School-Education-by-Sam-Seidel.pdf
    • http://cefasfese.4pu.com/7735736737734739/Seidel-s-Guide-to-Physical-Examination-by-Jane-W-Ball.pdf
    • http://cefasfese.4pu.com/9737730731735730/How-To-Speed-Read-For-College-In-Minutes-by-Fredy-Seidel.pdf
    • http://cefasfese.4pu.com/7735734730736738/The-Jacobin-Republic-1792-1794-by-Marc-Bouloiseau.pdf
    • http://cefasfese.4pu.com/7735734734735732/Survey-of-International-Arbitrations-1794-1989-by-A-M-Stuyt.pdf
    • http://cefasfese.4pu.com/7735737730733731/Inhuman-Thoughts-Philosophical-Explorations-of-Posthumanity-by-Asher-Seidel.pdf
    • http://cefasfese.4pu.com/9737730731734735/How-to-Make-a-Realistic-Goal-Plan-and-How-to-Achieve-It-by-Fredy-Seidel.pdf
    • http://cefasfese.4pu.com/7735736737736731/The-Fourth-Summer-Stand-Tall-1-by-Kathleen-Gilles-Seidel.pdf
    • http://cefasfese.4pu.com/773

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