Malicious PDF — malware analysis report

Static analysis result for SHA-256 e904f642d232f2ed…

MALICIOUS

PDF

15.4 KB Created: 2019-11-07 22:40:23 +00:00 Authoring application: mPDF 5.7
MD5: b58e7ce66740ee0b554e718913aed9e4 SHA-1: 3d021a8b1adef7d861a345141706ad4239ba882e SHA-256: e904f642d232f2ed069653a71f2b4a03f18788db849f1098e30217b5a1d22dc4
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine results or distribute potentially malicious documents, rather than providing legitimate content. The document body was unreadable, preventing a more specific assessment of its lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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
    • http://cefasfese.4pu.com/9734731736739732/The-Adventures-of-Tom-Sawyer-Independent-Banned-Books-series-18-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/5737736739735730/Mark-Twain-s-Adventures-of-Tom-Sawyer-The-Original-Text-Edition-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/6737733737731731/The-Adventures-of-Tom-Sawyer-English-French-bilingual-Edition-illustrated-Les-aventures-de-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/1731738737732736732/All-Quiet-on-the-Western-Front-Independent-Banned-Books-series-9-by-Erich-Maria-Remarque.pdf
    • http://cefasfese.4pu.com/5734732734735739/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/5732737735731737/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/8734739739733730/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/5734733730736733/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/8734735736736733/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/5737730733736736/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/8730733737736733/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/4730732738737734/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/3733736737734735/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/2733730733738739/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/9738736732731733/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/1730735732731734736/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/3738732737737739/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/8731737733737734/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/1731731735739736736/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf
    • http://cefasfese.4pu.com/6736733735735738/The-Adventures-of-Tom-Sawyer-by-Mark-Twain.pdf

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