Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a96d4fcd3001b1f…

MALICIOUS

PDF

16.1 KB Created: 2019-11-09 21:38:37 +00:00 Authoring application: mPDF 5.7
MD5: b7051d121e4c4f291f77a3cc2adf3e30 SHA-1: a3e3b283bd0e3e39a5db6a18a2658e07a0016a14 SHA-256: 5a96d4fcd3001b1f16c740bcac4f5eff7d0f667f318107bae21f900c887df2cc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm, which is a common technique for SEO manipulation or distributing malicious content. While the ML classifier strongly indicates maliciousness, the specific intent beyond linking is unclear as no executable scripts were extracted. The presence of numerous links suggests a potential initial access vector via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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/1732736737731730/Extinction-Point-Extinction-Point-1-by-Paul-Antony-Jones.pdf
    • http://cefasfese.4pu.com/2731739739737732/Exodus-Extinction-Point-2-by-Paul-Antony-Jones.pdf
    • http://cefasfese.4pu.com/9738736738/Extinction-Horizon-The-Extinction-Cycle-1-by-Nicholas-Sansbury-Smith.pdf
    • http://cefasfese.4pu.com/2733734730734732/Counter-Point-Heath-s-Point-Suspense-1-by-Marji-Laine.pdf
    • http://cefasfese.4pu.com/1737732732739736/Reckless-Point-Cross-Point-Village-1-by-Cora-Brent.pdf
    • http://cefasfese.4pu.com/3739733738730734/Point-of-No-Return-Turning-Point-1-by-N-R-Walker.pdf
    • http://cefasfese.4pu.com/5737736737739/Point-of-No-Return-Turning-Point-1-by-N-R-Walker.pdf
    • http://cefasfese.4pu.com/7737734731733/Point-Blanc-The-Graphic-Novel-Alex-Rider-The-Graphic-Novels-2-by-Antony-Johnston.pdf
    • http://cefasfese.4pu.com/5735735738738738/Wrecked-Under-the-Green-Point-Light-The-Background-to-the-Green-and-Mouille-Point-Lights-and-Stories-of-Six-Shipwrecks-in-the-Area-by-John-T-Dimond.pdf
    • http://cefasfese.4pu.com/6739734739733734/Riptide-of-Romance-Pleasure-Point-5-by-Jennifer-Jones.pdf
    • http://cefasfese.4pu.com/2735733736736735/Extinction-by-Mark-Alpert.pdf
    • http://cefasfese.4pu.com/4730732735733/Extinction-by-Thomas-Bernhard.pdf
    • http://cefasfese.4pu.com/5730734738732738/UNIT-Extinction-by-Andrew-Smith.pdf
    • http://cefasfese.4pu.com/3735730735738/Extinction-End-by-Nicholas-Sansbury-Smith.pdf
    • http://cefasfese.4pu.com/6733730735732739/Extinction-Game-by-Gary-Gibson.pdf
    • http://cefasfese.4pu.com/5730739734730731/I-Saw-Nothing-The-Extinction-of-the-Thylacine-by-Gary-Crew.pdf
    • http://cefasfese.4pu.com/1731733736737/Snowfall-on-Haven-Point-Haven-Point-5-by-RaeAnne-Thayne.pdf
    • http://cefasfese.4pu.com/3739735738737737/Extinction-The-Wasteland-Chronicles-6-by-Kyle-West.pdf
    • http://cefasfese.4pu.com/4736739733733733/Extinction-Journals-by-Jeremy-Robert-Johnson.pdf
    • http://cefasfese.4pu.com/4732731737736737/The-Ark-Plan-Edge-of-Extinction-1-by-Laura-Martin.pdf

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