Malicious PDF — malware analysis report

Static analysis result for SHA-256 c890d8a690e85211…

MALICIOUS

PDF

54.6 KB Created: 2021-05-30 21:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d449f43a7ca7792c4a46a922d4b5828 SHA-1: 7a514085b5782376d0959ab9ef71f5fcbc7d06cc SHA-256: c890d8a690e85211a1929a5329108490a561c7b4fd678b71db407a699695df78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/74c4053e9c83d3098604c8383aff7781/tavukowalelisunofobakupov.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/42357744190.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4fjsb744b5u506v5gttilsh302/52392357690.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e25baeba45---kusubuluxafoved.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e30971300---36090753082.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6541a59d---vokapupavamopo.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/680a6619d469ff7fd63208d7b0247bba/10788039693.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1deaadf0cbf4dfc36742d9726f739c26/jugonudiwelagikoju.pdf
    • http://mppscstudy.com/admin/usercontent/file/50193406500.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072e7ae4cc96---wivojesibo.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f39a9a2747---65297324619.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608216c9de432---mejikorokezerutixap.pdf
    • https://cottonweb.net/userfiles/file/615198855.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8sb66uhhndtbqdi07p92r9lvo7/72416245291.pdf
    • http://backkwang.com/userData/board/file/vuvukis.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160781a147ba11---69774498193.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/9eb510d01cd2d45b227a6c90600510a8/99492364239.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+factory+reset+samsung+tablet+without+google+account

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