Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ee54c6cfe8b8ef…

MALICIOUS

PDF

19.2 KB Created: 2019-06-04 10:23:51 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-28
MD5: 04f7a9f27ee9e6119d781cfc85e0997f SHA-1: 94dee6d0e42c0c445ccaaaac827a8c67179ab3f0 SHA-256: 28ee54c6cfe8b8efbdd885ebcaa13703e6ddeafb7f2d07de260cb3fa8884c87a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to external PDF files. This behavior is indicative of a link farm or SEO spam technique, likely intended to drive traffic or potentially host malicious content disguised as legitimate documents. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/5731735739735732/Field-Marshal-Sir-Henry-Wilson-A-Political-Soldier-by-Keith-Jeffery.pdf In PDF document text
    • http://cefasfese.4pu.com/9738739732735738/Henry-Keith-Baron-Keith-of-Kinkel-by-Jesse-Russell.pdfIn PDF document text
    • http://cefasfese.4pu.com/4733732736734733/The-Secret-History-of-MI6-1909-1949-by-Keith-Jeffery.pdfIn PDF document text
    • http://cefasfese.4pu.com/9733730739730731/Field-Marshal-Count-Moltke-1800-1878-1879-by-Wilhelm-Muller.pdfIn PDF document text
    • http://cefasfese.4pu.com/1736738735734737/The-Memoirs-of-Field-Marshal-the-Viscount-Montgomery-of-Alamein-K-G-by-Bernard-Montgomery.pdfIn PDF document text
    • http://cefasfese.4pu.com/8737731732730739/Hitler-s-Commander-Field-Marshal-Walther-Model--Hitler-s-Favorite-General-by-Steven-H-Newton.pdfIn PDF document text
    • http://cefasfese.4pu.com/3738734737736735/Memoirs-of-Field-Marshal-Montgomery-by-Bernard-Montgomery.pdfIn PDF document text
    • http://cefasfese.4pu.com/5739735739730731/Revolutionary-Soldier-1775-1783-by-C-Keith-Wilbur.pdfIn PDF document text
    • http://cefasfese.4pu.com/3736730730736730/The-Marshal-and-the-Madwoman-Marshal-Guarnaccia-Mystery-6-by-Magdalen-Nabb.pdfIn PDF document text
    • http://cefasfese.4pu.com/9737737734736731/The-Marshal-s-Own-Case-Marshal-Guarnaccia-Mystery-7-by-Magdalen-Nabb.pdfIn PDF document text
    • http://cefasfese.4pu.com/1731730731738738735/Political-Participation-by-Henry-Bienen.pdfIn PDF document text
    • http://cefasfese.4pu.com/2734731731738732/Henry-Reed-s-Big-Show-by-Keith-Robertson.pdfIn PDF document text
    • http://cefasfese.4pu.com/2734730739736738/Henry-Reed-s-Think-Tank-by-Keith-Robertson.pdfIn PDF document text
    • http://cefasfese.4pu.com/2733737739730731/Henry-Reed-s-Journey-by-Keith-Robertson.pdfIn PDF document text
    • http://cefasfese.4pu.com/9731735734736736/Henry-Knox-Bookseller-Soldier-Patriot-by-Anita-Silvey.pdfIn PDF document text
    • http://cefasfese.4pu.com/1731730731738738733/Military-Intervenes-The-Case-Studies-in-Political-Development-Case-Studies-in-Political-Development-by-Henry-Bienen.pdfIn PDF document text
    • http://cefasfese.4pu.com/5734738732735734/The-Amazing-Dr-Ransom-s-Bestiary-of-Adorable-Fallacies-A-Field-Guide-for-Clear-Thinkers-by-Douglas-Wilson.pdfIn PDF document text
    • http://cefasfese.4pu.com/8738739736731730/Diaries-of-Field-Marshal-Mohammad-Ayub-Khan-1966-1972-by-Mohammad-Ayub-Khan.pdfIn PDF document text
    • http://cefasfese.4pu.com/2735734736739732/On-the-Altar-of-Freedom-A-Black-Soldier-s-Civil-War-Letters-from-the-Front-by-James-Henry-Gooding.pdfIn PDF document text
    • http://cefasfese.4pu.com/2734733731731731/Twisted-The-Collected-Stories-of-Jeffery-Deaver-by-Jeffery-Deaver.pdfIn PDF document text

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