Malicious PDF — malware analysis report

Static analysis result for SHA-256 036f84adc23c09b9…

MALICIOUS

PDF

16.6 KB Created: 2019-04-30 19:27:20 +01:00 Authoring application: mPDF 5.7
MD5: 50caa7c022c12ec9128a34aa40835d61 SHA-1: 5cbfdc8d8c714b4a9d224fee790ba8e6ab656a8f SHA-256: 036f84adc23c09b93638438bf5876ab15a3d30519ead26a6576e10ff35801d08
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm. This technique is often used for SEO poisoning or to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings suggest it's designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7193313-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7193313-0
  • 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/3730737735/Lost-Among-the-Living-by-Simone-St-James.pdf
    • http://cefasfese.4pu.com/3733738736734739/Lost-Among-the-Living-by-Simone-St-James.pdf
    • http://cefasfese.4pu.com/1735730736739/The-Living-and-the-Dead-Robert-McNamara-and-Five-Lives-of-a-Lost-War-by-Paul-Hendrickson.pdf
    • http://cefasfese.4pu.com/1730736737738737739/Simone-Weil-A-Life-by-Simone-P-trement.pdf
    • http://cefasfese.4pu.com/4733735737731736/Every-Living-Thing-by-James-Herriot.pdf
    • http://cefasfese.4pu.com/6734737731738732/Life-Grid-Wisdom-from-Above-for-Living-Here-Below-by-James-Poitras.pdf
    • http://cefasfese.4pu.com/1737732732734731/Octopussy-amp-the-Living-Daylights-James-Bond-14-by-Ian-Fleming.pdf
    • http://cefasfese.4pu.com/2737735731731735/The-Celestine-Vision-Living-the-New-Spiritual-Awareness-by-James-Redfield.pdf
    • http://cefasfese.4pu.com/4739738731733730/A-Better-Ten-Commandments-A-Guide-to-Living-Life-With-and-on-Purpose-by-James-Miller.pdf
    • http://cefasfese.4pu.com/6736734732732731/The-Ages-of-Gaia-A-Biography-of-Our-Living-Earth-by-James-E-Lovelock.pdf
    • http://cefasfese.4pu.com/8736734731734732/Remembering-Jean-s-Greatest-Gift-Living-Happily-at-Home-with-Alzheimer-s-by-James-Murr.pdf
    • http://cefasfese.4pu.com/2737735735735738/My-Lost-Mexico-by-James-A-Michener.pdf
    • http://cefasfese.4pu.com/2735737734736738/Lost-property-by-James-Moloney.pdf
    • http://cefasfese.4pu.com/3739739731735737/The-Lost-Continent-of-Mu-by-James-Churchward.pdf
    • http://cefasfese.4pu.com/1736735738737733/Lost-Horizon-by-James-Hilton.pdf
    • http://cefasfese.4pu.com/4732731736736736/Lost-Faith-to-Living-Faith-by-Ren-R-Royal.pdf
    • http://cefasfese.4pu.com/4733733730736738/The-Marquis-de-Sade-An-Essay-by-Simone-de-Beauvoir-by-Simone-de-Beauvoir.pdf
    • http://cefasfese.4pu.com/3732733735737738/The-Lost-Get-Back-Boogie-by-James-Lee-Burke.pdf
    • http://cefasfese.4pu.com/9738736738738/The-Lost-Prophet-Ramsey-2-by-James-B-McPike.pdf
    • http://cefasfese.4pu.com/1735737732736731/The-Lost-Property-Office-by-James-R-Hannibal.pdf

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