Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde2b54b567102aa…

MALICIOUS

PDF

15.8 KB Created: 2019-05-02 06:12:52 +01:00 Authoring application: mPDF 5.7
MD5: bfaebf615eb33f4585768addb971c600 SHA-1: 9738d9801fa8f5a0977ce23625e405e53a1223ea SHA-256: cde2b54b567102aa61bd90e5f1c47f31a6282c96e6a12d0e01715733d217529e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. While most of these specific URLs are marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM indicate a malicious intent, likely for SEO manipulation or to redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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/4739732730734735/Murder-at-the-Witching-Hour-Sand-and-Sea-Hawaiian-Mystery-3-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/3737736733738731/Murder-at-Dolphin-Bay-Sand-and-Sea-Hawaiian-Mystery-1-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/1731734736739733739/Derby-Divas-Zoe-Donovan-Mystery-8-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/1731739734738731737/Alaskan-Alliance-Zoe-Donovan-Mystery-12-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/1731739735731731739/The-Valentine-Mystery-Tess-and-Tilly-2-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/2739738732730735/Ghostly-Graveyard-Zoe-Donovan-Mystery-17-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/4734734734739730/Santa-Sleuth-Zoe-Donovan-Mystery-18-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/4738731730733738/Christmas-Crazy-Zoe-Donovan-Mystery-3-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/8732734738733730/Christmas-Cozy-Zoe-Donovan-Mystery-11-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/8730737738733736/Hopscotch-Homicide-Zoe-Donovan-Mystery-16-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/2739738732731732/Pumpkins-in-Paradise-Tj-Jensen-Paradise-Lake-Mystery-1-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/4734734737734730/The-Mad-Catter-Whales-and-Tails-2-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/3737736730737736/The-Witching-Hour-by-Jeph-Loeb.pdf
    • http://cefasfese.4pu.com/2739738732730738/The-Legend-of-Tabby-Hollow-Whales-and-Tails-5-by-Kathi-Daley.pdf
    • http://cefasfese.4pu.com/2732735730739739/An-Innovative-Murder-for-the-Season-A-Lt-Sinclair-Plate-in-Sand-Waves-Mystery-Book-1-by-Deborah-D-R-Kralich.pdf
    • http://cefasfese.4pu.com/1734737739732735/The-Witching-Hour-Eternal-Lovers-1-by-Marie-Hall.pdf
    • http://cefasfese.4pu.com/3738736735739734/-6-19-per-Witching-Hour-Paranormal-Personnel-Saga-1-by-Joanna-Mazurkiewicz.pdf
    • http://cefasfese.4pu.com/2736736730730/The-Witching-Hour-Lives-of-the-Mayfair-Witches-1-by-Anne-Rice.pdf
    • http://cefasfese.4pu.com/3737736738735737/Witching-Murder-Charmian-Daniels-10-by-Jennie-Melville.pdf
    • http://cefasfese.4pu.com/2732731730738730/Murder-of-the-Future-by-Kathi-S-Barton.pdf