Malicious PDF — malware analysis report

Static analysis result for SHA-256 099cd78dc579d3b1…

MALICIOUS

PDF

19.9 KB Created: 2019-06-04 13:33:33 +01:00 Authoring application: mPDF 5.7
MD5: fca058f760882086c16b6309b65f8c3c SHA-1: bd481eab38f1515b347b62f436202d8d5c50facd SHA-256: 099cd78dc579d3b1699752e5a54573d0a2922706e29f78864ffd1a40b64ce80f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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/3731735736730739/Do-or-Diner-A-Comfort-Food-Mystery-1-by-Christine-Wenger.pdf
    • http://cefasfese.4pu.com/1738733735731/Retro-Diner-Comfort-Food-from-America-s-Roadside-by-Linda-Everett.pdf
    • http://cefasfese.4pu.com/3731735736739733/Coming-Home-to-the-Comfort-Food-Caf-Comfort-Food-Cafe-3-by-Debbie-Johnson.pdf
    • http://cefasfese.4pu.com/3730738736730739/Comfort-Food-Without-Borders-by-Sia-Ayrom.pdf
    • http://cefasfese.4pu.com/8736730735737732/The-Comfort-Food-Cookbook-by-Johanna-Burkhard.pdf
    • http://cefasfese.4pu.com/8736730735732735/300-Best-Comfort-Food-Recipes-by-Johanna-Burkhard.pdf
    • http://cefasfese.4pu.com/3731730737733736/Saveur-The-New-Comfort-Food-Home-Cooking-from-Around-the-World-by-James-Oseland.pdf
    • http://cefasfese.4pu.com/4735734732735734/Last-Diner-Standing-Rose-Strickland-Mystery-2-by-Terri-L-Austin.pdf
    • http://cefasfese.4pu.com/1731733735735735739/The-Southern-Slow-Cooker-Big-Flavor-Low-Fuss-Recipes-for-Comfort-Food-Classics-by-Kendra-Bailey-Morris.pdf
    • http://cefasfese.4pu.com/3730738739735731/Whole-Food-The-30-day-Whole-Food-Ultimate-Cookbook-100recipes-Whole-Food-Diet-Whole-Food-Cookbook-Whole-Food-Recipes-Clean-Eating-Paleo-Ketogenic-by-Ryanne-Anna.pdf
    • http://cefasfese.4pu.com/4739739737739734/No-Comfort-for-the-Lost-Mystery-of-Old-San-Francisco-1-by-Nancy-Herriman.pdf
    • http://cefasfese.4pu.com/5737734730735732/Saveur-Italian-Comfort-Food-by-The-Editors-of-Saveur.pdf
    • http://cefasfese.4pu.com/1730730733733730735/Spain-and-Portugal-The-Traveler-s-Food-and-Wine-Guide-by-Christine-Nawrat.pdf
    • http://cefasfese.4pu.com/2739738737730738/Comfort-Object-Comfort-1-by-Annabel-Joseph.pdf
    • http://cefasfese.4pu.com/9730731730733734/Food-and-Nutrition-at-Risk-in-America-Food-Insecurity-Biotechnology-Food-Safety-and-Bioterrorism-by-Sari-Edelstein.pdf
    • http://cefasfese.4pu.com/1730736737738730737/Food-Regulation-Food-Safety-Recalls-Claims-Additives-Allergens-and-Biotechnology-Food-and-Drug-Law-Book-9-by-Roseann-B-Termini-Esq-.pdf
    • http://cefasfese.4pu.com/3735737732731730/The-Wild-Inside-Glacier-Mystery-1-by-Christine-Carbo.pdf
    • http://cefasfese.4pu.com/1735737738736732/The-Wild-Inside-Glacier-Mystery-1-by-Christine-Carbo.pdf
    • http://cefasfese.4pu.com/3731735735734736/Devil-s-Food-Cake-A-Culinary-Mystery-3-by-Josi-S-Kilpack.pdf
    • http://cefasfese.4pu.com/3735739738734732/Devils-Comfort-MC-Brothers-of-Devils-Comfort-MC-0-5-by-Brair-Lake.pdf