Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fe7786298f82f2…

MALICIOUS

PDF

62.3 KB Created: 2021-07-21 01:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0ff1afc2dc8344ba88ea3dd93148b9c0 SHA-1: bc72af2048d44dd9b856ec3764ece6cb9eff9e2a SHA-256: 05fe7786298f82f2b11c76b65a67f77a85adb3eec6f341022e8922097022dc79
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains numerous links to external resources, many of which point to compromised WordPress sites. The ClamAV detection and heuristic firings indicate this PDF is likely a phishing or malware distribution lure. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/8809fb450d515300e191e8147fc6813d/65422130238.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/epiqfo9gltiorpidoo729hv8l1/55394422309.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/56i13qnqss02deqij2dm63s5m7/xubur.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/54311970457.pdfIn PDF document text
    • https://bem-sa.com/img/file/razejesamajivarivosaje.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/cbc4a224e513db3091aa914b77876f6c/fowunodukorexopan.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/46430867998.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a041c46011e---witijarineja.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/71973316504.pdfIn PDF document text
    • http://yejida.com/userfiles/file/dezumelerus.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/32247303317.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/gumofaronelimeji.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/2cadc33f8a761228ca0a718781de61bf/buberoliguwekokibevenip.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bda84daad05---kojuru.pdfIn PDF document text
    • http://iltorg.ru/upload/file/95548146267.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/67964611348.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/kiwojudatutisedabaludumer.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16cab5fab---63726844517.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/318991909.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/66781640605.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/5aaed09b95ec66a4c36a92657d1e6053/79650255038.pdfIn PDF document text
    • http://ambulatorioveterinariovianello.eu/userfiles/files/30351519742.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/zuzipavori.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608415ee07d78---33552402214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=steinberg+adolescence+9th+edition+pdfPDF link annotation

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