Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9b2c4dd3662944…

MALICIOUS

PDF

15.9 KB Created: 2019-11-07 10:23:27 +00:00 Authoring application: mPDF 5.7
MD5: 00bdfdfa7de0709e9b40d38795f80e7e SHA-1: 87f51b81a2ea8614f3199e6e4e3e87b542be3f3e SHA-256: cd9b2c4dd366294467466e5882a9fa1307fef1c81e463617b8badd66c6267390
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample. The primary attack pattern involves directing users to a large number of external URLs hosted on the suspicious domain 'cefasfese.4pu.com'.

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/1737736733738731/Night-of-the-Crabs-by-Guy-N-Smith.pdf
    • http://cefasfese.4pu.com/1730734731735733734/Vampire-crabs-of-the-Genus-Geosesarma-by-Martin-H-hle.pdf
    • http://cefasfese.4pu.com/4736734738737736/The-Crabby-Condition-The-March-of-the-Crabs-1-by-Arthur-de-Pins.pdf
    • http://cefasfese.4pu.com/3737734739738730/Attack-of-the-Killer-Crabs-Spooksville-18-by-Christopher-Pike.pdf
    • http://cefasfese.4pu.com/4736732730731/Witchlight-Night-World-9-by-L-J-Smith.pdf
    • http://cefasfese.4pu.com/2739733732730733/Night-Moves-G-Man-3-by-Andrea-Smith.pdf
    • http://cefasfese.4pu.com/1731736737734731/High-Tide-for-Horseshoe-Crabs-by-Lisa-Kahn-Schnell.pdf
    • http://cefasfese.4pu.com/4736739730739/The-Night-Life-of-the-Gods-by-Thorne-Smith.pdf
    • http://cefasfese.4pu.com/1732739731736735/Strange-Fate-Night-World-10-by-L-J-Smith.pdf
    • http://cefasfese.4pu.com/4732733736733735/Friday-Night-at-Honeybee-s-by-Andrea-Smith.pdf
    • http://cefasfese.4pu.com/4739734730735/Night-Of-A-Thousand-Stars-amp-Other-Portraits-Of-Iraq-by-Joel-Preston-Smith.pdf
    • http://cefasfese.4pu.com/4736730734738735/Light-in-the-Night-Spirit-Photography-at-the-Cottage-by-Lois-Anne-Smith.pdf
    • http://cefasfese.4pu.com/4735736735733738/Night-After-Night-Night-Riders-Motorcycle-Club-1-by-Kathryn-Thomas.pdf
    • http://cefasfese.4pu.com/4732733738739737/Meet-Mrs-Smith-My-Adventures-with-Six-Kids-One-Rockstar-Husband-and-a-Heart-to-Fight-Poverty-by-Anna-Smith.pdf
    • http://cefasfese.4pu.com/3735732731730/The-History-of-Joseph-Smith-by-His-Mother-by-Lucy-Mack-Smith.pdf
    • http://cefasfese.4pu.com/6736735734735731/A-Night-Out-Night-School-Revue-Sketches-Early-Plays-by-Harold-Pinter.pdf
    • http://cefasfese.4pu.com/3736731734733736/Night-Voices-Night-Journeys-Lairs-of-the-Hidden-Gods-1-by-Ken-Asamatsu.pdf
    • http://cefasfese.4pu.com/3739732736736730/Night-Classes-Night-Series-1-by-Kris-Owens-Norris.pdf
    • http://cefasfese.4pu.com/2731737736734732/Night-People-Things-We-Lost-in-the-Night-1-by-Larry-J-Dunlap.pdf
    • http://cefasfese.4pu.com/1738735738731730/The-Tyranny-of-the-Night-Instrumentalities-of-the-Night-1-by-Glen-Cook.pdf

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