Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e53dd5302270f5…

MALICIOUS

PDF

12.6 KB Created: 2019-05-03 06:01:56 +01:00 Authoring application: mPDF 5.7
MD5: 28a317b7b7be96d9a258d298f9b1820c SHA-1: e87387d85fd1d551afd2fc5117fc41d14e3e164f SHA-256: 35e53dd5302270f54d9773f9c2b06bfffe15bf4a36be5c801d47aae06bd1836e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external PDF files. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document. The embedded URLs are likely used to drive traffic to a website, potentially for SEO manipulation or to host malicious content, although the linked PDFs themselves were classified as benign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/3730738735732730/Blackwood-Lily-Blackwood-Wolves-1-by-R-L-Kirk.pdf
    • http://cefasfese.4pu.com/1730735735738734739/Lily-The-Blackwood-Wolves-Saga-1-by-R-L-Kirk.pdf
    • http://cefasfese.4pu.com/1738732730739734/Bound-to-Blackwood-House-Blackwood-1-by-Sharon-Lipman.pdf
    • http://cefasfese.4pu.com/2736734732732736/The-Beast-of-Clan-Kincaid-Highland-Warrior-1-by-Lily-Blackwood.pdf
    • http://cefasfese.4pu.com/7732734730730735/The-Human-Chord-by-Algernon-Blackwood-Fiction-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/2735733736739738/Tap-That-by-Jennifer-Blackwood.pdf
    • http://cefasfese.4pu.com/4735736732737735/The-Wendigo-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/3737731737733739/The-Damned-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/1736739738732730/The-Blackwood-Crusade-by-Jo-Danilo.pdf
    • http://cefasfese.4pu.com/2732736736734739/Blackwood-by-Celia-Aaron.pdf
    • http://cefasfese.4pu.com/1739730732730731/Blackwood-by-Celia-Aaron.pdf
    • http://cefasfese.4pu.com/3739735731735731/The-Willows-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/1735733737738730/Blackwood-by-Gwenda-Bond.pdf
    • http://cefasfese.4pu.com/3730734733738731/The-Blackwood-Crusade-by-Jo-Danilo.pdf
    • http://cefasfese.4pu.com/9739734732738/Curiosity-by-Gary-L-Blackwood.pdf
    • http://cefasfese.4pu.com/3739735730731737/The-Wendigo-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/4739730735733735/Blackwood-s-Lady-by-Gail-Whitiker.pdf
    • http://cefasfese.4pu.com/4737734738732735/Duelling-for-a-Wife-by-Gemma-Blackwood.pdf
    • http://cefasfese.4pu.com/3731730738735736/Jimbo-A-Fantasy-by-Algernon-Blackwood.pdf
    • http://cefasfese.4pu.com/6733730739735736/The-Slave-s-Dhammapada-by-Adrian-Blackwood.pdf

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