Malicious PDF — malware analysis report

Static analysis result for SHA-256 da508eb720856b89…

MALICIOUS

PDF

16.7 KB Created: 2019-06-13 16:13:13 +01:00 Authoring application: mPDF 5.7
MD5: fc8a06ba784c5d3bf9ddaf3b2a954a55 SHA-1: 7972d9ef5504d222f1731b5b0950c71cbbb061d5 SHA-256: da508eb720856b8933f5d9fe31f5d250a482b3c3b76266d2634cf7fc6490d8eb
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and contains a significant number of embedded URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates these URLs are part of a link farm, suggesting a deceptive purpose such as SEO manipulation or directing users to potentially malicious content. While the specific intent is unclear without further analysis of the linked content, the sheer volume of links points to a non-standard, likely malicious, use of the PDF format.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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/6730738739730730/Italo-Calvino-Letters-1941-1985---Updated-Edition-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/6730738739735734/Italo-Calvino-en-Mexico-Italo-Calvino-in-Mexico-by-Jill-Hartley.pdf
    • http://cefasfese.4pu.com/7737732733735/t-zero-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/3730739739732/Cosmicomics-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/8734733730739/Marcovaldo-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/1733738739738735/The-Uses-of-Literature-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/7730737732731/Under-the-Jaguar-Sun-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/7739738738733739/The-Daughters-of-the-Moon-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/6730738739732733/The-Queen-s-Necklace-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/5732732738736/The-Complete-Cosmicomics-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/1733737738734739/Six-Memos-For-The-Next-Millennium-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/6730738738739738/Hermit-in-Paris-Autobiographical-Writings-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/7738733736739734/Il-barone-rampante-Ediz-speciale-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/8739736733737734/Marcovaldo-oder-Die-Jahreszeiten-in-der-Stadt-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/6730738739731738/italo-calvino-invisible-cities-by-Holly-Eliza-Neal.pdf
    • http://cefasfese.4pu.com/1730732739730731/Our-Ancestors-The-Cloven-Viscount-The-Baron-in-the-Trees-The-Non-Existent-Knight-by-Italo-Calvino.pdf
    • http://cefasfese.4pu.com/7734736732730737/Translation-as-Stylistic-Evolution-Italo-Calvino-Creative-Translator-of-Raymond-Queneau-by-Federico-Federici.pdf
    • http://cefasfese.4pu.com/9736734735737730/Das-Buch-Zum-Buch-Italo-Calvino-Wenn-Ein-Reisender-In-Einer-Winternacht-by-Andrea-Bartsch.pdf
    • http://cefasfese.4pu.com/6732736737738738/This-England-Is-So-Different-Italo-Svevo-s-London-Writings-by-Italo-Svevo.pdf
    • http://cefasfese.4pu.com/7731730730739/Loves-Music-Loves-to-Dance-by-Mary-Higgins-Clark.pdf

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