Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d2b82790714a74…

MALICIOUS

PDF

61.0 KB Created: 2021-06-10 17:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b5982e01506553e2f5cf68b1c104a682 SHA-1: a7b29fcb11ad09e7d2a16a1250a224f8688cb5a1 SHA-256: c5d2b82790714a7462d3b31eb1da680504755fd7c8e6d5eb969c74ec4063138c
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 pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The presence of 'utm_term' in one URL indicates a potential SEO manipulation tactic to attract unsuspecting visitors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7054

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://pistant.ru/uplcv?utm_term=spirited+away+full+movie+kissanime PDF link annotation
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160779a23d76de---69129206493.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8b439e278d1bf77d33d1a3ae974c756c/rerubutilipuwugoka.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d92512072d849e15a973485e10955436/pipatevetofikijifubape.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/vdfj2p1ia7f0r9pond3bfj9tj6/mufakizulivoxufizutaj.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/73307733017.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/5c598c353780eb5ee05489e110ec2993/13648389869.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076861b425cc---16012924913.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ur6lhfmaqo9bd2gi1c7951egh3/tuvutuwagakabiviwewu.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/kjicb4729d3agcnj03g10d19g1/85330548179.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078870da45b9---wesesukaxeg.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/hi9o6105n0u6mkn5e4m38mmqjn/zosalesusegumuwege.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b83088acc---gafajonurigagub.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7a9cef5b---38184317507.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/viwowetejekapojovu.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ce0eedfd---demutuvibekedufizewovodom.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/72641622047.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffe5f8f3a0---ludisogipa.pdfIn PDF document text

Related samples 8

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