Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca8ba0c48d19a31…

MALICIOUS

PDF

13.7 KB Created: 2019-11-28 22:37:58 +00:00 Authoring application: mPDF 5.7
MD5: cd12655b76cfcb19a539952d588c3ad6 SHA-1: ed70c366e86a1b092ddd19757d6d6a98ceb0e4e7 SHA-256: 1ca8ba0c48d19a31670f52f3afc4ca9845cc556f58b52762709333c73625240a
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for distributing malware or phishing content. The ML classifier also strongly indicated maliciousness. While the document body is heavily obfuscated and unreadable, the presence of numerous links to external PDFs on the same domain suggests a link farm designed to lure users to malicious content. 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/2736732733736730/The-Mistletoe-Phenomenon-Mistletoe-Science-1-by-Serena-Yates.pdf
    • http://cefasfese.4pu.com/2733731738735738/The-Solstice-Mistletoe-Effect-Mistletoe-Science-2-by-Serena-Yates.pdf
    • http://cefasfese.4pu.com/3731734734736730/Under-the-Mistletoe-by-Mary-Balogh.pdf
    • http://cefasfese.4pu.com/1732731732733/Under-the-Mistletoe-by-Kristin-Hardy.pdf
    • http://cefasfese.4pu.com/2738732731735734/Pemberley-Mistletoe-by-Ayr-Bray.pdf
    • http://cefasfese.4pu.com/4734738731738737/Four-Under-the-Mistletoe-by-Charlie-Richards.pdf
    • http://cefasfese.4pu.com/3733738731738734/Midnight-Mistletoe-by-Kathleen-Lee.pdf
    • http://cefasfese.4pu.com/7735732739732737/Bet-on-a-Mistletoe-by-Yvette-Hines.pdf
    • http://cefasfese.4pu.com/8732732738738739/Mistletoe-Omega-by-S-C-Wynne.pdf
    • http://cefasfese.4pu.com/7735732735732737/Meet-Me-Under-the-Mistletoe-by-Abby-Clements.pdf
    • http://cefasfese.4pu.com/1732731737734/Mistletoe-and-Mayhem-by-Christie-Ridgway.pdf
    • http://cefasfese.4pu.com/3734731739734730/The-Mistletoe-Murder-and-Other-Stories-by-P-D-James.pdf
    • http://cefasfese.4pu.com/9731733735730/Snow-and-Mistletoe-by-Alexa-Riley.pdf
    • http://cefasfese.4pu.com/1739733737731/Mistletoe-Mishap-by-Siri-Caldwell.pdf
    • http://cefasfese.4pu.com/2736734730735733/The-Mistletoe-Murder-and-Other-Stories-by-P-D-James.pdf
    • http://cefasfese.4pu.com/4734735732731731/Mistletoe-amp-Margaritas-by-Shannon-Stacey.pdf
    • http://cefasfese.4pu.com/3737733734731738/Mischief-and-Mistletoe-by-Mary-Jo-Putney.pdf
    • http://cefasfese.4pu.com/1730736739739734739/Mistletoe-Waltz-by-Alanna-Lucas.pdf
    • http://cefasfese.4pu.com/2732735732730734/A-Mistletoe-Kiss-by-Jennifer-Faye.pdf
    • http://cefasfese.4pu.com/2732735731734736/Blame-It-on-the-Mistletoe-by-Nicole-Michaels.pdf
    • http://cefasfese.4pu.com/1739733737731/Mistletoe-Mishap-by-S

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