Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa42fdff309671d1…

MALICIOUS

PDF

20.7 KB Created: 2019-06-04 12:32:54 +01:00 Authoring application: mPDF 5.7
MD5: 1d6300771c28d3af59a92c86694e3974 SHA-1: bc0c8eaa9da7149509b177929a95c0caec3e03d5 SHA-256: fa42fdff309671d161c9ff4c18343eef337d9bea0e184cd170a88c28affdc75d
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing a large number of external links, suggesting a link farm or SEO manipulation tactic. While the ML classifier also indicated maliciousness, the specific intent beyond link distribution is unclear as no scripts were extracted and the document body was heavily obfuscated. The dominant host for these links is cefasfese.4pu.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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/1736736738735737/Unbending-Gender-by-Joan-C-Williams.pdf
    • http://cefasfese.4pu.com/4737730732737731/Women-vs-Feminism-Why-We-All-Need-Liberating-from-the-Gender-Wars-by-Joanna-Williams.pdf
    • http://cefasfese.4pu.com/1732739739735731/Women-Among-the-Inklings-Gender-C-S-Lewis-J-R-R-Tolkien-and-Charles-Williams-by-Candice-Fredrick.pdf
    • http://cefasfese.4pu.com/8732737735730736/White-Working-Class-by-Joan-C-Williams.pdf
    • http://cefasfese.4pu.com/6733736730739736/Growing-Free-A-Carmelite-Remembers-by-Joan-Williams.pdf
    • http://cefasfese.4pu.com/7736735730733733/Jesus-Justice-and-Gender-Roles-A-Case-for-Gender-Roles-in-Ministry-by-Kathy-Keller.pdf
    • http://cefasfese.4pu.com/3739730739733732/What-Does-Joan-Say-My-Seven-Years-as-White-House-Astrologer-to-Nancy-and-Ronald-Reagan-by-Joan-Quigley.pdf
    • http://cefasfese.4pu.com/9732739732738738/The-Gender-Game-4-Krieg-der-Geschlechter-The-Gender-Game-Machtspiel-der-Geschlechter-Volume-4-by-Bella-Forrest.pdf
    • http://cefasfese.4pu.com/3730739737732738/Cooking-at-Home-Williams-Sonoma-by-Chuck-Williams.pdf
    • http://cefasfese.4pu.com/3739731739736732/A-Narrative-of-Events-since-the-First-of-August-1834-by-James-Williams-an-Apprenticed-Labourer-in-Jamaica-by-James-Williams.pdf
    • http://cefasfese.4pu.com/4731737739739730/The-Complete-Writings-of-Roger-Williams---Volume-3-Bloudy-Tenent-of-Persecution-by-Roger-Williams.pdf
    • http://cefasfese.4pu.com/5739732732732732/The-Seventh-Octave-The-Early-Writings-of-Saul-Williams-by-Saul-Williams.pdf
    • http://cefasfese.4pu.com/1731738733738735737/-The-Exiled-Queen-The-Seven-Realms-Series-Book-2-By-Cinda-Williams-Chima-published-November-2011-by-Cinda-Williams-Chima.pdf
    • http://cefasfese.4pu.com/1730735736737738731/The-Gender-Shift-by-Ben-Schrodinger.pdf
    • http://cefasfese.4pu.com/4730730733732735/Grammar-and-Gender-by-Dennis-Baron.pdf
    • http://cefasfese.4pu.com/1730735736737738733/Girl-Flu-2-The-Second-Gender-Swap-by-Ben-Schrodinger.pdf
    • http://cefasfese.4pu.com/1730735736736733734/Gender-Swap-Aphrodisiac-2-by-Ben-Schrodinger.pdf
    • http://cefasfese.4pu.com/1730735736735738737/Gender-Swap-Aphrodisiac-by-Ben-Schrodinger.pdf
    • http://cefasfese.4pu.com/9732731730731/Magic-Dirt-The-Best-of-Sean-Williams-by-Sean-Williams.pdf
    • http://cefasfese.4pu.com/9735733731737737/Gothic-amp-Gender-An-Introduction-by-Donna-Heiland.pdf

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