Malicious PDF — malware analysis report

Static analysis result for SHA-256 411b5d7aafe7a570…

MALICIOUS

PDF

50.3 KB Created: 2021-06-09 09:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2b8714a553c8d193c18c8c822bea9509 SHA-1: 0466067e2e217f921031f40a6b5b34d3f00d30a6 SHA-256: 411b5d7aafe7a5709dd2eb3c48471ce56e198eb62ecf1dc5c894fa1dca827e4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score indicate malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a movie title, reinforcing the lure of free downloads to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7011

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://philabc.ru/uplcv?utm_term=dear+zindagi+full+movie+download+moviescounter PDF link annotation
    • https://grupahatak.pl/admin/_fck_files/file/71857063310.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86f422443---zusek.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/f27363fe18a1ff5af64f467083e37b3e/32308665592.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/tajaropupugala.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/708c458db809170d5ae441f5ea44d2e8/73810590174.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/unjo54tkr5apo8rotrf9c41a71/buker.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608082e544649---vivilatexibatafozin.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ecc53ef9---99654798436.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/h829gfrkdcn9d6f7mvkhhagq5d/wopagexazemekilibi.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/42fc2ece2750277dde81a04887d6bdcd/juvovibolunabipek.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9c4f33d63da06f9186e487966e4d611a/49615637668.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/58229082942.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/00c9d89ea303fbf9c8f7f6266150f7a3/59866691305.pdfIn PDF document text

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