Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bed5dc43271d82…

MALICIOUS

PDF

46.5 KB Created: 2021-07-05 08:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6cb368c9fb31bcd0b78dd3e889e36832 SHA-1: c20f71ca6dc9704dcb77f7c347ec8f1bb61222ba SHA-256: 61bed5dc43271d8297d83b5e9354189b722e4a923c39f9974e2befc19cc84e92
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of numerous links on disposable or compromised hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/64fa0a9f0657aba9c2a8dd3b9d58d010/wegelemefogulewe.pdf In PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9c9418dde25c375229cfb4cffee6c8e2/guteveralifib.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6926bed320da0fddb8e556dd7960dd66/vegumavofenazusa.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/fabatenadososime.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160951b02ea491---tuganazepowamasux.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6c82b1a38b99b5098660099f9f90574/35457451621.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4237d441---kugurege.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/puzereto.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/dmu9t807t94acdkjps76g8qt26/deruwekozududatide.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f722d251e---48929209418.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/586e8gflc94hglqg1fvgaaglnq/watusadi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609695f90e1d6---65537203922.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0e284814055ec2612636d346a547a875/mubazexewedozadejedabe.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/hp46rk2ffdktjbqvqffb0arqe7/ruwoze.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/kerexiti.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/67806881486.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4db49083---femusizojubadomu.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/fabiselunaregafulunadav.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04188d65af---birajudaku.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/58808075421.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094721a9a67f---57127320333.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d88e4f727b5---keriremegoseviza.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/guzakexo.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/15852902352.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/pofilotokigekufativomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+ejaculation+in+biologyPDF link annotation

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