Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6403acb759c3718…

MALICIOUS

PDF

14.6 KB Created: 2019-04-30 10:30:08 +01:00 Authoring application: mPDF 5.7
MD5: 12e16623214f9ae18985daef67b75a19 SHA-1: a4cf64b5d2913ea51d20f2df6cacc83dde21f45c SHA-256: d6403acb759c3718f6bb0d3246965340258e540003f3ef8968236bef50fe266b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. While the specific URLs appear benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to host further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/2737737735733734/Phantastes-A-Faerie-Romance-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/4732735732730730/3000-Quotations-from-the-Writings-of-George-MacDonald-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/6730738735735731/The-Christmas-Stories-of-George-MacDonald-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/4732734739736733/The-Collected-Works-of-George-MacDonald-The-Complete-Works-PergamonMedia-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2733739739734734/The-George-MacDonald-Treasury-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/4735730739736731/Getting-To-Know-Jesus-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/3739738738738739/Lilith-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/5736736738738731/The-Princess-and-the-Goblin-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2730732738734734/The-Light-Princess-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/1738730735736739/The-Princess-and-Curdie-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2730735730737736/The-Giant-s-Heart-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/1732735731734739/The-Reavers-by-George-MacDonald-Fraser.pdf
    • http://cefasfese.4pu.com/4732738730730732/The-Princess-And-The-Goblin-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2734732739737733/Wee-Sir-Gibbie-of-the-Highlands-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/4736730739738/The-Fisherman-s-Lady-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/3736732733737736/The-Diary-of-an-Old-Soul-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2733736734739739/The-Light-Princess-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2737731733731739/Your-Life-in-Christ-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/3736731738739739/The-Princess-and-the-Goblin-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/1730733739730730737/The-Shepherd-s-Castle-Sir-Gibbie-2-by-George-MacDonald.pdf
    • http://cefasfese.4pu.com/2730735730737736/The-Giant-s-Heart

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