Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d11f06748885aaa…

MALICIOUS

PDF

57.0 KB Created: 2021-06-24 17:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7d7e6e7c586f2de164b83af388f6c001 SHA-1: 1b6ea864bd4070a4c849bb229d51627c1e2b3221 SHA-256: 6d11f06748885aaa297ef6bcd047ff2431bddcc00573d09e2950c13cb2da95bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'national credit act regulations pdf', indicating a lure to disguise the malicious intent. No scripts were extracted, but the overall structure and URL findings strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7337

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=national+credit+act+regulations+pdf PDF link annotation
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5363531037---sefixabagojukefunizu.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/28908377668.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160898c8c11634---29681024861.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/53501862085.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d8f7da1f---86463909343.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/2109a9facd67fd0a8751ca4f05e38a10/rebapovadovu.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mslcu6crd5inam6ci6sg3ivoga/82957494427.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/99097743622.pdfIn PDF document text
    • http://vinmexindia.com/uploads/zubobonefuwanitizuwe.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/1889a25caacf20bf5aec6fbcce434ef3/27174259757.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/medabudabo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a6d5c02b254210b04fa0f0cc27742228/14484776554.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/wisuli.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/96003853013.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083ac8aa877e---xomojetefaluwosojurero.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160beeeb80ef9c---xenedaba.pdfIn PDF document text

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