Malicious PDF — malware analysis report

Static analysis result for SHA-256 667972b9b863b176…

MALICIOUS

PDF

63.7 KB Created: 2021-09-17 10:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95388d83c7576b061a9495e7a6859c2c SHA-1: 8298d1eb41beba10b521ed481b39952856237d77 SHA-256: 667972b9b863b176ad64547e0694e2a40cb42a2f4737eeb5f5f84fad7131cc61
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to external resources. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the structure of the links suggest an attempt to obscure the ultimate destination or to leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1bfc15cd26ec2a4155e06cd34b630ce4/50455548833.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143910292256---16524052900.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/sasabibadixebasa.pdfIn PDF document text
    • https://makenie.com/upload/files/34880831274.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/55573069378.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ede9c806eba57c2bb2c71330efa13dd7/50904018049.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cafd83b692---nozinawofogexemoxubipebeg.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/paloxaxixiwelodiva.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/65151342809.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/85850814999.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/15278919833.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0ba0b3e93---belizobidosari.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/42523107358.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/13526016935.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/gidabodezolelod.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/90659765285.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/88950449807.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd8c905f85---wakabudug.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/54680251206.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137b47f0051a---bojegigano.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/sesorib.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/23383524732.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/78772762138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ps2+emulation+androidPDF link annotation

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