Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc844696c83a2c27…

MALICIOUS

PDF

54.0 KB Created: 2021-09-14 03:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5188b5074979714b9ea98d7021c8dbef SHA-1: f2086b8df44a1690c9e453312fdcfa807671783e SHA-256: bc844696c83a2c27c6eec9e6bd5203e7d5b084d1fd6f73463f8a12cfa100d010
124 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 WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The heuristic firings indicate this PDF is part of a link farm designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2555

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://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/2900051f1bef7e78bcfe5863feef2255/19448533037.pdf In PDF document text
    • http://kjphotocon.org/data/userfiles/files/84681653717.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/nekesadewazamemoxorafako.pdfIn PDF document text
    • http://soles2walk.com/data/file/59533395269.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/61493167091.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/bewixupelezosipur.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/36693993313.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/woxugikonelamiwuwiz.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/bomuliwikazad.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/wupivamebavefobiwon.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/pirekuwoxaboxuwu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/50812878427.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109090810046835.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/jijadasotosulubilal.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/lufolivagizop.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/24157781624.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/2530799700.pdfIn PDF document text
    • https://ventsistem-bg.com/userfiles/file/fenenopupenizokunifisa.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/65253456441.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/lelubeselezijenib.pdfIn PDF document text
    • http://fitviewer.biz/files/file/36356957257.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161350171e51c7---xitikeragovasi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136900f9fc03---67678624360.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/kugamikiti.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/75269510271.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/tumekitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=piaget+theory+of+cognitive+development+pdfPDF link annotation

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