Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6316e7350d989b…

MALICIOUS

PDF

51.4 KB Created: 2021-09-18 12:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b08e927936f014c3f797268a56a1300c SHA-1: 4e62875f8abbb5455e12200c90516d22ebc37419 SHA-256: 2f6316e7350d989b1ca15090664edf3230736fd309347039b7d4ace3d3a5f0e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier flagging further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest it's used to facilitate the download or redirection to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7531

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 http://aiswaryamatrimonials.com/fck_uploads/file/patuw.pdf
    • https://macauroommate.com/ckfinder/userfiles/files/zerokogu.pdf
    • http://redigonda.it/userfiles/files/91302089922.pdf
    • https://soudureornementalelauziere.com/upload/editor/file/641586996.pdf
    • http://lacasedescaraibes.fr/file/darafugotezuregen.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145372d9ac52---dojugimupase.pdf
    • http://life-homeshop.com/asset/uploads/files/92045005818.pdf
    • http://janaturismointegrato.com/uploads/file/nonuremolaluzonawi.pdf
    • http://rkmaster.ru/uploads/files/17379436536.pdf
    • http://szilasfood.hu/pic_upload/files/61799476818.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd6e46de23---91680953034.pdf
    • https://sowlindia.com/userfiles/file/68306355854.pdf
    • https://nutricount.cz/UserFiles/File/furosenorunosikuxed.pdf
    • https://reklama71.ru/upload_picture/genowarati.pdf
    • http://eortak.com/img/fck_temp/file/babojokeg.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f21fc48f11---tataniligop.pdf
    • http://abwrva.com/uploads/files/86106778277.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614054cfac2f3---kanoraxobimidoxa.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/74553742141.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/87489128202.pdf
    • https://tp-pos.com/uploads/image/files/41494076521.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/62562310289.pdf
    • http://kaupa.cz/userfiles/file/xudugum.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfe5969a09---34694987898.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+create+a+poster+using+word

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