Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89cfaba4aa3cb97…

MALICIOUS

PDF

152.9 KB Created: 2021-08-21 19:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cbeba48272e47392b2723cd90758ec75 SHA-1: f52d7cca4672d234b003b2a20e8043ab88c365a7 SHA-256: c89cfaba4aa3cb97be45eed6f808bd71556ff6b1d9fe8dfa59c18d7c7fefd40a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8865

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 http://fobosgrunt.ru/files/ckfinder/files/logijozabi.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6b291f76d7e1d49893cd59b08be9f020/xewojuwitela.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089db10b5433---74109491387.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/bojemipufekowufizuxabapet.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/2f1f83f36e3ba10f7197b4cee71244aa/durajezokibezamasujagidi.pdfIn PDF document text
    • https://ovalpolycoats.com/media/25126570790.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abb5787b597---52108151541.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/67072982468.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/16974192379.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/gudipigobiguvofufo.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/8ju48qv7korvcd52th0jcce0jt/32612893572.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607954aaf1984---teluvebesalakozisen.pdfIn PDF document text
    • http://ccymgr.com/clients/a/ab/abc9983c1712fd324c9320bcfcf975a8/File/wugudafaxazodijazoka.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/zexalaseronokilepusu.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/kmruf6nku656gapum9edo4guqe/79618956651.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/4843253823.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/letavudewitezowisavuje.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/butofidifokukozejakadog.pdfIn PDF document text
    • http://yuha.be/_files/file/bunugerotovotuwixofonoma.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8213b909da3ee5cc6d727da48ad04ced/65024481435.pdfIn PDF document text
    • http://mousike.it/img_ins/files/bibefejofonuz.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9b2c92022---15079859505.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/71732861573.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f390da5cc0---mutaviludesixaxexinuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=witsi+witsi+ara%C3%A3+a+letra+en+ingl%C3%A9sPDF link annotation

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