Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d03f3e3e5c9d98…

MALICIOUS

PDF

64.0 KB Created: 2021-08-18 04:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de79966873c28755ee9f7996c430ec48 SHA-1: 38e82c4c31af6d3afe0a4d0df6f9267989acc1c3 SHA-256: 34d03f3e3e5c9d98e17f71ca6f4ca1a157c5093d71659e3b4a2032444bcfeda5
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malware. Heuristics indicate it's a phishing trojan, and the ML classifier strongly supports maliciousness. The primary attack vector appears to be luring users to download further malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9593

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.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c7a5aa7fe---26710436370.pdf In PDF document text
    • https://chmelo.hu/sites/default/files/file/biwudapox.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/kujagafovumugabimowejer.pdfIn PDF document text
    • https://tch.lu/files/files/loterajatopij.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/2820453123.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab79da544---76424518982.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/99193239681.pdfIn PDF document text
    • https://maintogelonline2.org/contents//files/6649300550.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a3cf0a5e---dilikabepiwudanapava.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6414ac48---fizusofebo.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/9339914826.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/moxojabata.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/gatenaxa.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/sukebazonegenagonafef.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/14138a691bb637de03a911e8181de5ac/boworobavimerosafe.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/zuxorepuwoze.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050215404973499.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/sepemenapovoxegabiges.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/sofefopok.pdfIn PDF document text
    • http://rentaruedas.com/files/others/58758624835.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/953ae2ba5e05dc4063e9af94b58985cc/9785948307.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1df741a1ac91f2d4226d82bd058cf2e2/govaxezefaxa.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4241a0a01---vozuxom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=budget+worksheet+excel+free+downloadPDF link annotation

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