Malicious PDF — malware analysis report

Static analysis result for SHA-256 72609640ce6c877e…

MALICIOUS

PDF

17.3 KB Created: 2019-05-03 05:12:13 +01:00 Authoring application: mPDF 5.7
MD5: 7121a09f5c2676985276217b4ecc8cbb SHA-1: 5b193a42a8c2d1423b580f03d7b1e50c89e89885 SHA-256: 72609640ce6c877e2e1d2fedba45bf3f46537ace4b7e3ecb1d52c0b60432de61
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a link farm. While no scripts were extracted, the heuristic firings suggest the document's primary purpose is to direct users to these external resources. The ML classifier also strongly indicated maliciousness, supporting the assessment of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/2735739731731/Best-New-Horror-1-The-Mammoth-Book-of-Best-New-Horror-1-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/4730738732733736/Best-New-Horror-23-The-Mammoth-Book-of-Best-New-Horror-23-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/9735737732739/Best-New-Horror-18-The-Mammoth-Book-of-Best-New-Horror-18-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/4730738734730730/Best-New-Horror-22-The-Mammoth-Book-of-Best-New-Horror-22-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/2738735737737737/Best-New-Horror-20-The-Mammoth-Book-of-Best-New-Horror-20-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/9735737732735/Best-New-Horror-19-The-Mammoth-Book-of-Best-New-Horror-19-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/3736737737737732/Best-New-Horror-16-The-Mammoth-Book-of-Best-New-Horror-16-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/9735737735734/Dark-Voices-The-Pan-Book-of-Horror-5-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/2736732735732/Dark-Terrors-v-1-The-Gollancz-Book-of-Horror-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/3737735733732/Horror-Another-100-Best-Books-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/4730738734733736/The-Mammoth-Book-of-Monsters-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/2739731738734733/The-Mammoth-Book-of-Werewolves-by-Stephen-Jones.pdf
    • http://cefasfese.4pu.com/9731739739735739/Horror-Stories-Classic-Tales-from-Hoffmann-to-Hodgson-by-Darryl-Jones.pdf
    • http://cefasfese.4pu.com/6738733731734737/Night-Shift-Excursions-into-Horror-by-the-Author-of-Carrie-and-The-Shining-by-Stephen-King.pdf
    • http://cefasfese.4pu.com/5731731737731737/The-Body-Horror-Book-by-Claire-Fitzpatrick.pdf
    • http://cefasfese.4pu.com/5730733732737733/The-Book-Splash-Horror-Story-by-Cassia-Brightmore.pdf
    • http://cefasfese.4pu.com/2736733732737/Dark-Voices-2-The-Pan-Book-of-Horror-by-David-Sutton.pdf
    • http://cefasfese.4pu.com/3734730739739737/The-Stephen-King-Universe-A-Guide-to-the-Worlds-of-the-King-of-Horror-by-Stanley-Wiater.pdf
    • http://cefasfese.4pu.com/9735737731735/Back-from-the-Dead-The-Legacy-of-the-Pan-Book-of-Horror-Stories-by-Johnny-Mains.pdf
    • http://cefasfese.4pu.com/9731737738734738/Das-gro-e-Horror-Lesebuch-Die-Nacht-der-lebenden-Toten-Book-of-the-Dead-1-by-John-Skipp.pdf

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