Malicious PDF — malware analysis report

Static analysis result for SHA-256 552f8b6f6f372545…

MALICIOUS

PDF

21.0 KB Created: 2019-05-01 18:51:00 +01:00 Authoring application: mPDF 5.7
MD5: 123165c747d66a9b46a1b18f108fd9cf SHA-1: a3ac0c75f224decb510d0a2b89842f0bd43edea9 SHA-256: 552f8b6f6f3725455ac08e6c7b56278910dd3ca29a1f8964602320903a28c86d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which point to various book titles. The ML_NYX_PDF_MALICIOUS classifier also flagged this document with high confidence. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content disguised as legitimate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

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/2737733730735732/A-Song-of-Ice-and-Fire-5-Book-Boxed-Set-A-Game-of-Thrones-A-Clash-of-Kings-A-Storm-of-Swords-A-Feast-for-Crows-A-Dance-with-Dragons-Song-of-Ice-amp-Fire-1-5-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/9736730739732739/Song-of-Ice-and-Fire-Audiobook-Bundle-A-Game-of-Thrones-HBO-Tie-In-a-Clash-of-Kings-HBO-Tie-In-a-Storm-of-Swords-a-Feast-for-Crows-and-a-Dance-with-Dragons-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/9736730739733732/A-Game-of-Thrones-4-Book-Bundle-A-Song-of-Ice-and-Fire-Series-A-Game-of-Thrones-A-Clash-of-Kings-A-Storm-of-Swords-and-A-Feast-for-Crows-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/4736734737731/A-Game-of-Thrones-A-Clash-of-Kings-A-Song-of-Ice-and-Fire-1-2-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/4734737731734734/A-Feast-for-Crows-A-Song-of-Ice-and-Fire-4-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/3736733736736735/A-Feast-for-Crows-A-Song-of-Ice-and-Fire-4-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/6731730732733/A-Clash-of-Kings-A-Song-of-Ice-and-Fire-2-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/7731738733733/A-Clash-of-Kings-A-Song-of-Ice-and-Fire-2-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/1739730734731736/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/5736736734732738/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/4738734734733736/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/2737736730737732/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/6733735737733/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/4732734735730/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/2736732734733/A-Game-of-Thrones-A-Song-of-Ice-and-Fire-1-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/2732732731730737/A-Storm-of-Swords-A-Song-of-Ice-and-Fire-3-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/5735738734731/A-Storm-of-Swords-A-Song-of-Ice-and-Fire-3-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/3731734734735732/A-Storm-of-Swords-A-Song-of-Ice-and-Fire-3-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/2734738738738/A-Storm-of-Swords-A-Song-of-Ice-and-Fire-3-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/5738734737730/A-Dance-with-Dragons-A-Song-of-Ice-and-Fire-5-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/9736730739733732/A-Game-of-Thrones-4-Book-