Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebef633f3f65830…

MALICIOUS

PDF

13.8 KB Created: 2020-01-02 06:04:51 +00:00 Authoring application: mPDF 5.7
MD5: ae249069ce8b2ef9a502d2fc822de30f SHA-1: bacd75e7ffb3885aee0e9a0911846e16f78052e4 SHA-256: 9ebef633f3f65830220b34f7896e30f268d2512da99e49f9a9727c2ce194551b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external websites, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are marked as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. 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/1730732736739/Just-One-Day-Just-One-Day-1-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/4733733732735736/Just-One-Day-Just-One-Day-1-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/7736733733/I-Have-Lost-My-Way-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/1730738731739734737/I-Have-Lost-My-Way-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/4738732739736730/Where-She-Went-If-I-Stay-2-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/8738734736731736/Und-ein-ganzes-Jahr-Just-One-Day-2-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/8735730730735738/Where-She-Went---Setelah-Dia-Pergi-If-I-Stay-2-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/3734734737738739/If-I-Stay-If-I-Stay-1-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/4731735738730736/If-I-Stay-If-I-Stay-1-by-Gayle-Forman.pdf
    • http://cefasfese.4pu.com/2736730731736734/Eliza-Gayle-BDSM-Romance-Bundle-by-Eliza-Gayle.pdf
    • http://cefasfese.4pu.com/2730734733732736/Deviations-A-Gayle-Rubin-Reader-by-Gayle-S-Rubin.pdf
    • http://cefasfese.4pu.com/3730731736732731/Better-Angel-by-Forman-Brown.pdf
    • http://cefasfese.4pu.com/6737738737734734/Being-Polite-to-Hitler-by-Robb-Forman-Dew.pdf
    • http://cefasfese.4pu.com/3731735734736737/Song-of-Jubilee-by-James-D-Forman.pdf
    • http://cefasfese.4pu.com/1731734739730736/Ceremony-of-Innocence-by-James-D-Forman.pdf
    • http://cefasfese.4pu.com/6737738738732733/Really-Dead-A-Ria-Butler-Mystery-by-J-E-Forman.pdf
    • http://cefasfese.4pu.com/2739734735736735/Sands-of-Nezza-Adventurers-Wanted-4-by-M-L-Forman.pdf
    • http://cefasfese.4pu.com/2731730732733732/The-Horn-of-Moran-Adventurers-Wanted-2-by-M-L-Forman.pdf
    • http://cefasfese.4pu.com/6737738738737735/The-Forman-Genealogy-by-Anne-Spottswood-From-Old-Ca-Dandridge.pdf
    • http://cefasfese.4pu.com/3737738738731/Slathbog-s-Gold-Adventurers-Wanted-1-by-M-L-Forman.pdf
    • http://cefasfese.4pu.com/67

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