Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdf65506c18c558…

MALICIOUS

PDF

14.7 KB Created: 2019-05-02 17:51:33 +01:00 Authoring application: mPDF 5.7
MD5: ee697cb63e89d11948cce57d13bbdf23 SHA-1: bb77c014aaef6dcf7c87ca06890bbd9552290b33 SHA-256: fcdf65506c18c55866004028c8b4b21bc8d3fcbf34b594af57caceaa6cd6e23f
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. It contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The primary domain observed is 'cefasfese.4pu.com'. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/3735733738735730/Rabbit-Novels-Rabbit-Run-and-Rabbit-Redux-by-John-Updike.pdf
    • http://cefasfese.4pu.com/2735739739736736/Rabbit-Redux-by-John-Updike.pdf
    • http://cefasfese.4pu.com/4738737736738730/Snow-Rabbit-Spring-Rabbit-A-Book-of-Changing-Seasons-by-Il-Sung-Na.pdf
    • http://cefasfese.4pu.com/9733732731732736/Rabbit-in-Red-Volume-1-Follow-the-Rabbit-by-Joe-Chianakas.pdf
    • http://cefasfese.4pu.com/4736732738739736/Who-P-P-P-Plugged-Roger-Rabbit-Roger-Rabbit-2-by-Gary-K-Wolf.pdf
    • http://cefasfese.4pu.com/3730733731738730/Who-Censored-Roger-Rabbit-Roger-Rabbit-1-by-Gary-K-Wolf.pdf
    • http://cefasfese.4pu.com/5733732735735737/Who-Wacked-Roger-Rabbit-Roger-Rabbit-3-by-Gary-K-Wolf.pdf
    • http://cefasfese.4pu.com/7738738735737734/Laser-Moose-and-Rabbit-Boy-Disco-Fever-Laser-Moose-and-Rabbit-Boy-2-by-Doug-Savage.pdf
    • http://cefasfese.4pu.com/2733739739734738/The-Little-Rabbit-by-Judy-Dunn.pdf
    • http://cefasfese.4pu.com/2737731737735734/When-God-was-a-Rabbit-by-Sarah-Winman.pdf
    • http://cefasfese.4pu.com/1732730735733735/Down-the-Rabbit-Hole-by-J-D-Robb.pdf
    • http://cefasfese.4pu.com/8732730738738731/The-Rabbit-Handbook-by-K-Gendron.pdf
    • http://cefasfese.4pu.com/4731736733733737/The-Rabbit-Who-Wished-He-Could-Fly-by-Erik-Ammon.pdf
    • http://cefasfese.4pu.com/4737735736738733/Rabbit-in-the-Jungle-by-Anthony-Alegrete.pdf
    • http://cefasfese.4pu.com/4738735732735/The-Rabbit-Factory-by-Larry-Brown.pdf
    • http://cefasfese.4pu.com/3738736730730730/The-Rabbit-s-Adventure-by-Betty-Ren-Wright.pdf
    • http://cefasfese.4pu.com/5730731736733736/Through-the-Rabbit-Hole-by-Lisa-Kumar.pdf
    • http://cefasfese.4pu.com/6732739733730739/Teddy-Rabbit-by-St-phane-Poulin.pdf
    • http://cefasfese.4pu.com/5732734730/Rabbit-Cake-by-Annie-Hartnett.pdf
    • http://cefasfese.4pu.com/2733731736737735/The-White-Rabbit-by-David-Balzarini.pdf
    • http://cefasfese.4pu.com/1732730735733735/Down-

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