Malicious PDF — malware analysis report

Static analysis result for SHA-256 f648c2e78ec17139…

MALICIOUS

PDF

52.8 KB Created: 2021-06-14 09:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4bd422c7c63e99e630bb899b09963881 SHA-1: 34c03b711c284f752e57515a4fb2cf258ae303a8 SHA-256: f648c2e78ec17139539d08c1be57eef1ccf6204475f8cabd61a46db263b6f0cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to network configuration, potentially luring users searching for technical solutions into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7021

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=pfsense+disable+firewall+cli PDF link annotation
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/e6463943b4ac5b1f18f88195bbee6962/madevorosubegam.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083b14952fdd---34287527554.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/gmg9kvvbn8uk0etqpu7u67cqvm/15334925039.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/e7kmu3o258tn0blbu4lb94o7dn/pebox.pdfIn PDF document text
    • http://atek-ent.com/upload/file/97097644763.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071810e35fd9---73258034946.pdfIn PDF document text
    • http://allycatering.com/userfiles/22105366502.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/gosupamutozaxamuwigin.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d3104631438403ffcc6d1732ce354cf5/74159677901.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/67ea7c9511b79c40e7f2e8d80ab0a448/86009603709.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/zosibusefamuvaro.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/fekejatujabemejesagem.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/37372110881.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160922385e921c---81098832381.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4fm117d4nv44pe3f4kregd71vf/kateses.pdfIn PDF document text

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