Malicious PDF — malware analysis report

Static analysis result for SHA-256 3850607cc0184f28…

MALICIOUS

PDF

63.7 KB Created: 2021-06-27 23:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0c9c8ff133f35ef2524ca5da73dcfcfb SHA-1: 739346b0f2e01f509c2ee85dba5357ae52cdeeb1 SHA-256: 3850607cc0184f28cd14022479652925af090ca0528e4fd7ed289b3a80fc5f71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links indicate it's designed to lure users to external sites, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5435

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://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0998bff0d03635823b474a386332c497/51517734163.pdf In PDF document text
    • https://aspirans.com/files/file/fogosivezibel.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/59688974553.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/5a77d6bbba9c53c8936f8592c688e9f8/60442387621.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cecda4bdcaa---jesejosav.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/te6bh2lpusd29tlsl1c9vbasrh/61456645754.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac278550306---tuxadebavexi.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795deb18722---78956480613.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/rosasotenuwo.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/27445328702.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/musuxotuwitates.pdfIn PDF document text
    • http://fkhd.cz/data/img/depezamunofukegux.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/pudaw.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f20e37d888b83e915727366d1c3cc2ea/25516485394.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/68378192546.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/39161524692.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab541b46793---1001013071.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8047c2f86---35744417461.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/18604936234.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8orlhmpg8qkjj1q9u0mpijiamv/70133088461.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b546a860556---13745561913.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/pugubitoxewavatawane.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/akgoptst9g6qinnlb4lv5pi6j6/14238862185.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608490b3e6c5c---73116508351.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/hbt7hn9o616mkbla23bgcs7fci/75846083517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=it+is+very+much+appreciatedPDF link annotation

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