Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7cf92ce67b7f41…

MALICIOUS

PDF

16.6 KB Created: 2020-03-18 22:35:47 +00:00 Authoring application: mPDF 5.7
MD5: 199c5819bc1e4d700e4d69c950b53b1d SHA-1: 0f7751d2966757f9ce128132de0d28970e343ea1 SHA-256: bd7cf92ce67b7f41f47d922597d04965e4232128dbdc2c2c4a4816deeb8aaa14
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 to external PDF files, hosted on a domain with a suspicious numeric slug. This is indicative of SEO poisoning or a link farm designed to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://lwoscmobook.myhome.cx/1524052455246524752435241/The-Time-Machine-the-Original-Novel-Annotated-Masterpiece-Collection-The-Time-Machine-H-G-Wells-Famous-Quotes-Book-List-and-Biography-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/152405242524252475249/The-Time-Machine-The-Wonderful-Visit-and-Other-Stories-The-Works-of-H-G-Wells-Vol-1-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/652455241524852495248/The-Time-Machine-Herbert-George-Wells-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/552485240524452425245/The-Time-Machine-An-Invention-Annotated-H-G-Wells-1-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/552485248524052405246/The-Time-Machine-By-H-G-Wells---Illustrated-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/852415247524152435242/The-Time-Machine-The-Original-Time-Travel-Story-A-Short-Science-Fiction-Novel-about-Time-Travel-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/752425245524452425242/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/552455244524452405248/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/952495248524152425242/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/652455243524552455248/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/752415246524752485243/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/452495241524852435241/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/852435242524652405248/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/652495249524052425247/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/1524152405245524952445249/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/852425248524652435244/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/35242524352465244/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/952405245524152445246/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/552465247524952485247/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/852495244524952415246/The-Time-Machine-by-H-G-Wells.pdf
    • http://lwoscmobook.myhome.cx/852415247524152435242/The-Time-Machine-

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