Malicious PDF — malware analysis report

Static analysis result for SHA-256 caacf466140e070d…

MALICIOUS

PDF

21.0 KB Created: 2020-02-13 22:00:03 +00:00 Authoring application: mPDF 5.7
MD5: 1ba8af5e26e486f474b637fc82cf2891 SHA-1: 42ae52c6336a4fd54afeb701c30c10f53f16679f SHA-256: caacf466140e070d314a261c6f613f28f1daebfea74dae83b4d4e7463da98ef8
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly flagged this sample as malicious. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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/452415244524852415244/Home-Jack-Murphy-2-by-Matthew-J-Costello.pdf
    • http://lwoscmobook.myhome.cx/252465243524352425246/Vacation-Jack-Murphy-1-by-Matthew-J-Costello.pdf
    • http://lwoscmobook.myhome.cx/152475246524552475247/Child-s-Play-2-by-Matthew-J-Costello.pdf
    • http://lwoscmobook.myhome.cx/1524152415245524152485244/Morden-will-gelernt-sein-Cherringham-13-by-Matthew-Costello.pdf
    • http://lwoscmobook.myhome.cx/1524052465247524952435246/Cherringham-A-Cosy-Crime-Series-Compilation-Cherringham-4-6-by-Matthew-Costello.pdf
    • http://lwoscmobook.myhome.cx/1524052465247524952435244/Cherringham-A-Cosy-Crime-Series-Compilation-Cherringham-1-3-by-Matthew-Costello.pdf
    • http://lwoscmobook.myhome.cx/1524052465247524952435247/Cherringham-A-Cosy-Crime-Series-Compilation-Cherringham-7-9-by-Matthew-Costello.pdf
    • http://lwoscmobook.myhome.cx/1524052465247524952435249/Cherringham-A-Cosy-Crime-Series-Compilation-Cherringham-10-12-by-Matthew-Costello.pdf
    • http://lwoscmobook.myhome.cx/252425245524452495246/Sugarhouse-Turning-the-Neighborhood-Crack-House-into-Our-Home-Sweet-Home-by-Matthew-Batt.pdf
    • http://lwoscmobook.myhome.cx/152405245524752495244/Earthman-Jack-vs-the-Ghost-Planet-The-Earthman-Jack-Space-Saga-1-by-Matthew-Kadish.pdf
    • http://lwoscmobook.myhome.cx/152435243524752455244/Reflexive-Fire-by-Jack-Murphy.pdf
    • http://lwoscmobook.myhome.cx/752475243524352455240/Benghazi-The-Definitive-Report-by-Jack-Murphy.pdf
    • http://lwoscmobook.myhome.cx/252495245524952465249/7-Deadly-Wonders-Jack-West-Jr-1-by-Matthew-Reilly.pdf
    • http://lwoscmobook.myhome.cx/152415241524952445248/Seven-Ancient-Wonders-Jack-West-Jr-1-by-Matthew-Reilly.pdf
    • http://lwoscmobook.myhome.cx/452415240524752455247/The-Six-Sacred-Stones-Jack-West-Jr-2-by-Matthew-Reilly.pdf
    • http://lwoscmobook.myhome.cx/9524452485240/The-Three-Secret-Cities-Jack-West-Jr-5-by-Matthew-Reilly.pdf
    • http://lwoscmobook.myhome.cx/1524052475240524252485245/The-Six-Sacred-Stones-Jack-West-Junior-2-by-Matthew-Reilly.pdf
    • http://lwoscmobook.myhome.cx/25243524452405247/Marching-Home-Union-Veterans-and-Their-Unending-Civil-War-by-Brian-Matthew-Jordan.pdf
    • http://lwoscmobook.myhome.cx/252485245524052435243/Going-Local-in-Gran-Canaria-How-to-Turn-a-Holiday-Destination-Into-a-Home-by-Matthew-Hirtes.pdf
    • http://lwoscmobook.myhome.cx/752415245524252435248/Promenade-Home-Macrobiotics-and-Women-s-Health-by-Gale-Jack.pdf

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