Malicious PDF — malware analysis report

Static analysis result for SHA-256 6811c780b26ed21e…

MALICIOUS

PDF

16.7 KB Created: 2019-05-03 23:22:34 +01:00 Authoring application: mPDF 5.7
MD5: 55b474e0b035a3103bf20c49c704f8c9 SHA-1: 1d557ed5d34a18e3509787cf9528258b7e5161df SHA-256: 6811c780b26ed21ec4ea6ee7296b85977a2593ab2079b676d60554e170a10300
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a link farm. The primary heuristic indicates a mass of external PDF links, with many using numeric slugs in their URLs. While no scripts were extracted, the embedded links are the main vector for potential malicious activity, likely leading to phishing or further malware distribution. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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/6731735738733731/Marine-G-Special-Boat-Service-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738733734/Marine-I-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738733733/Marine-C-Sbs-The-Florida-Run-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738734733/Marine-C-SBS-The-Aegean-Campaign-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738734734/Soldier-Z-For-King-and-Country-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738734737/Soldier-y-Days-of-the-Dead-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738734739/Soldier-D-The-Colombian-Cocaine-War-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738734732/Sas-Stories-of-Heroes-VIII-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/6731735738736732/Soldier-K-Mission-to-Argentina-by-David-Monnery.pdf
    • http://cefasfese.4pu.com/8730738738733733/Always-Faithful-Always-Forward-The-Forging-of-a-Special-Operations-Marine-by-Dick-Couch.pdf
    • http://cefasfese.4pu.com/3738732735734732/Captain-Pantoja-and-the-Special-Service-by-Mario-Vargas-Llosa.pdf
    • http://cefasfese.4pu.com/5738738730733/Three-Bears-in-a-Boat-by-David-Soman.pdf
    • http://cefasfese.4pu.com/7736738730732738/Brer-Anansi-and-the-Boat-Race-by-David-Makhanlall.pdf
    • http://cefasfese.4pu.com/7734739738737738/U-Boat-977-The-U-Boat-that-Escaped-to-Argentina-by-Heinz-Schaeffer.pdf
    • http://cefasfese.4pu.com/2731734735731/Thank-You-for-Your-Service-by-David-Finkel.pdf
    • http://cefasfese.4pu.com/2732735731733733/A-Marine-of-Plenty-Always-a-Marine-17-by-Heather-Long.pdf
    • http://cefasfese.4pu.com/3739735737737732/A-Marine-and-a-Gentleman-Always-a-Marine-9-by-Heather-Long.pdf
    • http://cefasfese.4pu.com/7738737735737736/Seizing-The-Enigma-The-Race-To-Break-The-German-U-boat-Codes-1939-1943-by-David-Kahn.pdf
    • http://cefasfese.4pu.com/1730730734737739735/Internet-Denial-of-Service-Attack-and-Defense-Mechanisms-by-David-Dittrich.pdf
    • http://cefasfese.4pu.com/7736738738730731/At-Your-Service-Service-Oriented-Computing-from-an-EU-Perspective-by-Elisabetta-Di-Nitto.pdf

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