Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf6cb1ca73db003…

MALICIOUS

PDF

54.0 KB Created: 2021-07-01 16:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f16351ddcbfab648c134081afeeb789 SHA-1: 3c47b4303b0d0da1a56289516faca5a17277a374 SHA-256: 4cf6cb1ca73db003a28f246d3d9ab6ae23871fc433b4666485b8fbd3a4d53afc
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories. The ClamAV detection and the heuristic firings indicate that this PDF is designed to lead users to malicious content, likely for phishing or malware distribution. No scripts were extracted, and the document body was truncated, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4953

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.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e9014029---nagedokuvazogoj.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3098ae88ff---tonozujumepugoxatap.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/ae443d0e732790066cf5180460d8ff74/folixuwokaluvisuw.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b79109d6cce---finado.pdf
    • http://gianphoiduyloimodel.com/Images_upload/files/12763824856.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/79446875223.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608718b1a2b11---zuxoweruxikesoj.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/76cce679d52594aec17fcf0bc6f40769/nofuwukivalujet.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/35206413527.pdf
    • http://supermarketdv.ru/files/file/favuke.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/59389917856.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e46351e9---93594649380.pdf
    • http://goref.ru/files/file/minipaf.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/cbe8a8ad9728523b5438ad9b6e1c533e/16434167572.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/0c7720a9c76d435eab9af7c834702aa5/3451794733.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/01626f76298b6107b30202e507003d05/volumuxovat.pdf
    • http://web300k.com/upload/ck/files/kakipewojulomezewuges.pdf
    • http://ecogestval.com/userfiles/file/zidafetadurifewinejidajem.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5b0c87324---10186830847.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768f2c1d959---40761668319.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909eb67684d---48250143588.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c54fde71f4a---69636515145.pdf
    • http://houselandia.ru/files/63130100604.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=electrical+installation+technology+pdf

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