Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce162e2cd7962638…

MALICIOUS

PDF

69.5 KB Created: 2021-09-08 01:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5a1f3b64529d6b5fd876da536b35b44 SHA-1: 6b88c855e856d0bf04b50956d30ed608a1604299 SHA-256: ce162e2cd7962638163bdc27e99d0fea3e57e5f45f665fa7c25c1b2bd7b2229a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search engine results or distribute malicious content. ClamAV detected this file as a phishing trojan, and ML classifiers also flagged it as malicious. The primary attack pattern involves directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8303

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://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/2843dc36eb68513137b3a4f46641e8db/ditixojadawipawububer.pdf In PDF document text
    • http://studiofelician.com/userfiles/files/58579744068.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083c31027174---bunoxubi.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/27134566681.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/sukogeduberuvim.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607383ada3abf---29369942239.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/kuwotarejekiwugaxuzogakaf.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/nokewudefabu.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/xiwixitawoxunibo.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/30958521910.pdfIn PDF document text
    • https://migger.dk/userimages/file/kagokasubotiluvulile.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/df9fdc6cb1b13c3fc173ae0a6fb3e066/21957594538.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/85950700949.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0109450b0---92617744455.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea9dbdaba2---mirukare.pdfIn PDF document text
    • http://tcihk.com/userfiles/97797252593.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f9eb98375---24345179434.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d9In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=2016+sea+ray+240+sundeck+owners+manualPDF link annotation

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