Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c7515a4c025694…

MALICIOUS

PDF

18.0 KB Created: 2019-11-07 14:33:12 +00:00 Authoring application: mPDF 5.7
MD5: 97ccae8af7478822fd88525ac77940c2 SHA-1: f793c27c5f0045139fc3949dd030768de96ffb6c SHA-256: f5c7515a4c025694ae740e0d23dcc6d020098b594d43b49c9e9d3eb3ab036ced
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. While the ML classifier flagged it as malicious, the specific intent beyond hosting links is unclear as no scripts were extracted and the document body was heavily obfuscated. The primary IOCs are the numerous external URLs hosted within the PDF.

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/2730734736731734/River-Queen-Rose-In-Old-California-1-by-Shirley-Kennedy.pdf
    • http://cefasfese.4pu.com/3738731733735739/Pumpkin-Pumpkin-by-Jeanne-Titherington.pdf
    • http://cefasfese.4pu.com/4732735731735739/The-Other-Mrs-Kennedy-An-intimate-and-revealing-look-at-the-hidden-life-of-Ethel-Skakel-Kennedy-by-Jerry-Oppenheimer.pdf
    • http://cefasfese.4pu.com/3738733735738738/Kick-Kennedy-The-Charmed-Life-and-Tragic-Death-of-the-Favorite-Kennedy-Daughter-by-Barbara-Leaming.pdf
    • http://cefasfese.4pu.com/4731737734732/The-Best-Loved-Poems-of-Jacqueline-Kennedy-Onassis-by-Caroline-Kennedy.pdf
    • http://cefasfese.4pu.com/1730732739733731739/The-Kennedy-Wit-The-Humor-and-Wisdom-of-John-F-Kennedy-by-John-F-Kennedy.pdf
    • http://cefasfese.4pu.com/2735731737734732/Queen-Takes-Queen-Their-Vampire-Queen-3-by-Joely-Sue-Burkhart.pdf
    • http://cefasfese.4pu.com/7736735738730739/Simple-Decor-Extravagant-Living-The-Watson-Kennedy-A-to-Z-Guide-to-a-More-Beautiful-Life-by-Ted-Kennedy-Watson.pdf
    • http://cefasfese.4pu.com/5730731735732732/The-Queen-Mother-The-Untold-Story-of-Elizabeth-Bowes-Lyon-Who-Became-Queen-Elizabeth-The-Queen-Mother-by-Lady-Colin-Campbell.pdf
    • http://cefasfese.4pu.com/1735734737739734/The-Greatest-Speeches-Of-President-John-F-Kennedy-by-John-F-Kennedy.pdf
    • http://cefasfese.4pu.com/3738731738736732/Pumpkin-Cat-by-Ann-Turner.pdf
    • http://cefasfese.4pu.com/3738732733734738/I-Spy-a-Pumpkin-by-Jean-Marzollo.pdf
    • http://cefasfese.4pu.com/2739730732736739/Into-the-Pumpkin-by-Linda-Franklin.pdf
    • http://cefasfese.4pu.com/3738731736735738/Pumpkin-Trouble-by-Jan-Thomas.pdf
    • http://cefasfese.4pu.com/3735737739732739/Pumpkin-Moonshine-by-Tasha-Tudor.pdf
    • http://cefasfese.4pu.com/2732730736737737/How-Big-Could-Your-Pumpkin-Grow-by-Wendell-Minor.pdf
    • http://cefasfese.4pu.com/1734737730730730/The-Pumpkin-Patch-by-Rolf-and-Ranger.pdf
    • http://cefasfese.4pu.com/5731734736736/The-Pumpkin-Eater-by-Steven-W-Horn.pdf
    • http://cefasfese.4pu.com/3738731738736733/Pumpkin-Faces-by-Emma-Rose.pdf
    • http://cefasfese.4pu.com/3738731733736736/The-Biggest-Pumpkin-Ever-by-Steven-Kroll.pdf
    • http://cefasfese.4pu.com/7736735738730739/Simple-Decor-Extravagant-Living-The-Watson-

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