Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f03eda27a4f634…

MALICIOUS

PDF

52.6 KB Created: 2021-09-13 04:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87e98d292b04c34f476e50a7a194fd5f SHA-1: ac994b8bc5563ee0e62cbc2c58345157c0636d8d SHA-256: 12f03eda27a4f634ace145cf9bed97bc68b8414f8a64e4fb27d4c59acd921191
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6720

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://irlanc.ru/uplcv?utm_term=motion+class+9+mcq+with+answers+pdf PDF link annotation
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc971b5db2---64001944121.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/xotovijazutozu.pdfIn PDF document text
    • https://flammerouge.ch/userfiles/files/lizumesofonodefuwixo.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8f41541f018a9aacec8e0d38a85edd53/66874506071.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/40517296785.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/takitu.pdfIn PDF document text
    • http://bienbao.net/uploads/files/wefim.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/13176118319.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/tetuvikenefisixumijar.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/pojuwu.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/50536991946.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb0917a4c0---46612702815.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f333c82a5---pilosab.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/34284700299.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/fibubaxadezo.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/34509280983.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/satomejivonitezezavenaz.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/woniwibimexitoru.pdfIn PDF document text
    • https://fishboat.hr/files/sanixedaja.pdfIn PDF document text
    • http://bamor.org/userfiles/file/40434977298.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/fozikuwujiba.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/76332377812.pdfIn PDF document text
    • http://korytnica.net/data/files/gopuwavelum.pdfIn PDF document text
    • http://pk.mo/userfiles/file/65873745492.pdfIn PDF document text

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