Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9a6907c245374c…

MALICIOUS

PDF

58.2 KB Created: 2021-09-17 22:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9b472be7622e2f8f6da2a7017a482c4f SHA-1: 7ea431d84a75dc3ecddd34f58cc03518978d76de SHA-256: 0b9a6907c245374cb6732b3ad2845b9825445893fdadf3c2f18816331ad4e10f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

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://chcial.ru/uplcv?utm_term=best+blogs+2021 PDF link annotation
    • http://decaldankinh.net/upload/files/namiro.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/vinimolepilodom.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/famusametefasifuvoxu.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210904140634_623951409.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/27642087266.pdfIn PDF document text
    • http://consade.com/userfiles/file/35451869650.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/kuxubogukedobufalub.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ea4a24d4988510f3613440129fe88b54/defamovapokelo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/acac7c4708368723744e2d3fc8e8559a/49992043621.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/rapasowubalaka.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/topokaxuwizusok.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/58046313121.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/96408413556.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/77385936455.pdfIn PDF document text
    • https://parc-hotel.info/file/vakabijobubavaxivok.pdfIn PDF document text
    • https://mcsfood.com/images/file/43307509039.pdfIn PDF document text
    • http://gotween.com/userfiles/file///90530409384.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/winapuporo.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/39152517116.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/tezuj.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109130213373017.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210903143600.pdfIn PDF document text
    • http://fxlcd.com/upload/file/68594993963.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410dfe3fdeb---topos.pdfIn PDF document text

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