Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef05f3af9fdabfe5…

MALICIOUS

PDF

17.9 KB Created: 2019-05-03 16:08:30 +01:00 Authoring application: mPDF 5.7
MD5: bd36ca764175892967a8dbc0816ff638 SHA-1: 3e35aa4baeaa9eb260d9c3ef969c4b8b92bd4dbf SHA-256: ef05f3af9fdabfe527d2fc3301bd0d54ef4811cc2251144d4b5bf38c520a08ef
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO poisoning or to distribute malicious content. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, with the dominant host being cefasfese.4pu.com. While the ML classifier flagged this as malicious, the specific intent beyond linking to other documents is unclear from the provided evidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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/6738737/The-Gemini-Effect-by-Chuck-Grossart.pdf
    • http://cefasfese.4pu.com/7730739730737739/The-Phoenix-Descent-by-Chuck-Grossart.pdf
    • http://cefasfese.4pu.com/1732739731738736/Chuck-Amuck-The-Life-and-Time-of-an-Animated-Cartoonist-by-Chuck-Jones.pdf
    • http://cefasfese.4pu.com/3732737730733734/Mass-Effect-Annihilation-Mass-Effect-Andromeda-3-by-Catherynne-M-Valente.pdf
    • http://cefasfese.4pu.com/4734739739736/Mass-Effect-Revelation-Mass-Effect-1-by-Drew-Karpyshyn.pdf
    • http://cefasfese.4pu.com/3738738730732739/Mass-Effect-Initiation-Mass-Effect-Andromeda-2-by-N-K-Jemisin.pdf
    • http://cefasfese.4pu.com/1731738731738733/The-Chuck-Davis-History-of-Metropolitan-Vancouver-by-Chuck-Davis.pdf
    • http://cefasfese.4pu.com/6736737739732737/MENGELE-by-CAMARASA-JORGE-A-.pdf
    • http://cefasfese.4pu.com/6736737739731732/The-Mengele-Journals-by-S-James-Mitchell.pdf
    • http://cefasfese.4pu.com/6736738730730733/Mengele-Plague-A-Trinity-Twelve-Novel-by-Ron-Toppings.pdf
    • http://cefasfese.4pu.com/6736737739736733/Josef-Mengele-Angel-of-Death---A-Compilation-by-Various.pdf
    • http://cefasfese.4pu.com/6736737739731730/Josef-Mengele-Angel-of-Death-by-Anna-Revell.pdf
    • http://cefasfese.4pu.com/6736737739730738/Mengele-s-Skull-The-Advent-of-a-Forensic-Aesthetics-by-Thomas-Keenan.pdf
    • http://cefasfese.4pu.com/6736737739731735/Defy-the-Darkness-A-Tale-of-Courage-in-the-Shadow-of-Mengele-by-Joe-Rosenblum.pdf
    • http://cefasfese.4pu.com/1738736739734732/Surviving-the-Angel-of-Death-The-Story-of-a-Mengele-Twin-in-Auschwitz-by-Eva-Mozes-Kor.pdf
    • http://cefasfese.4pu.com/6736737739738730/Dge--Dun-Chos--Phel-A-Biography-of-the-20th-Century-Tibetan-Scholar-by-Irmgard-Mengele.pdf
    • http://cefasfese.4pu.com/1733730734733738/Chuck-Berry-The-Autobiography-by-Chuck-Berry.pdf
    • http://cefasfese.4pu.com/4735732731733736/Echoes-from-Auschwitz-Dr-Mengele-s-Twins-The-story-of-Eva-and-Miriam-Mozes-by-Eva-Mozes-Kor.pdf
    • http://cefasfese.4pu.com/6736738730738732/Josef-Mengele-L-angelo-della-morte-di-Auschwitz-I-Signori-della-Guerra-Vol-17-by-Richard-J-Samuelson.pdf
    • http://cefasfese.4pu.com/1732730737735734/The-Homecoming-Effect-by-Eda-J-Vor.pdf
    • http://cefasfese.4pu.com/6736737739731730/Josef-Mengele-Angel-of-Death-by-An

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