Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9120d0fca7392e…

MALICIOUS

PDF

72.6 KB Created: 2021-04-21 22:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d57e77285b79bf281346f9e0196848d3 SHA-1: f7701b282e543b471dec73a52d70fe8a7391f104 SHA-256: 8c9120d0fca7392ebc13d4160214dbc433d6453ce03dca7e55dfabf703be4254
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9513

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://www.pharoxglobal.com/sites/default/files/webform/50635107556.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/sidetarebuw.pdf
    • https://ambrose.edu/sites/default/files/webform/gewematumupam.pdf
    • https://www.termis.org/system/files/webform/67198091979.pdf
    • http://www.guninetwork.org/system/files/webform/heirri_proposals/zarogoluvesiriwameb.pdf
    • https://ambrose.edu/sites/default/files/webform/durigoxilakomisi.pdf
    • https://www.blplegal.com/sites/default/files/webform/89971565628.pdf
    • https://europa-ts.ru/sites/default/files/webform/totikejeropisatuzubafaba.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/tefofavokalozigukar.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/30253637425.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=tipos+de+investigacion+cualitativa+y+cuantitativa+segun+sampieri
    • https://printandmail.princeton.edu/system/files/webform/83401752781.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/libovonudipiguriteg.pdf
    • https://www.vub.be/sites/vub/files/webform/gegisikirusesikogibo.pdf

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