Malicious PDF — malware analysis report

Static analysis result for SHA-256 871af44f39d5f3ce…

MALICIOUS

PDF

16.1 KB Created: 2019-05-26 14:57:08 +01:00 Authoring application: mPDF 5.7
MD5: dffbb0be605fbdf9317c1c5c85a61dd8 SHA-1: a587aafcbedc81190cdcda53b53ee1748577f497 SHA-256: 871af44f39d5f3ceddb3879ca5a0c5229c168d1ea83d8914efe8f0c09ba2604e
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a potential SEO link farm. The ML classifier also flagged this PDF as malicious. While the specific intent of the links is unclear due to the benign reputation of the initial URLs, the sheer volume and the ML detection suggest a malicious purpose, likely to direct users to harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/1730735733733731730/Memoir-of-the-Life-of-Laurence-Oliphant-and-of-Alice-Oliphant-His-Wife-by-Margaret-Wilson-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733733730736/Memoir-of-the-Life-of-Laurence-Oliphant-and-of-Alice-Oliphant-His-Wife-Volume-2-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733733730738/Memoir-of-the-Life-of-Laurence-Oliphant-and-of-Alice-Oliphant-His-Wife-Volume-2-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731736737/Oliphant-s-Anthem-by-Pat-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731736739/Collected-Stories-by-Margaret-Oliphant-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733730738738/The-Works-of-Margaret-Oliphant-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733732736735/The-Oliphant--Smith-Debate-by-W-L-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733733731735/The-Classic-Works-of-Laurence-Oliphant-by-Laurence-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731737738/Works-of-Laurence-Oliphant-by-Laurence-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733730739731/He-That-Will-Not-When-He-May-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/3734734737738731/Hester-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/4739739738735738/The-House-on-the-Moor-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/6735738736730734/The-Marriage-of-Elinor-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731736733/The-Open-Door-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733733731739/The-Secret-Chamber-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731738734/Old-Lady-Mary-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731738735/The-Curate-in-Charge-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733730739737/The-Rector-and-The-Doctor-s-Family-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730735733731738738/Margaret-Oliphant-by-Jenni-Calder.pdf
    • http://cefasfese.4pu.com/1730735733731737735/A-Country-Gentleman-and-his-Family-by-Mrs-Oliphant.pdf
    • http://cefasfese.4pu.com/1730

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