Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf22ed30393b4665…

MALICIOUS

PDF

65.1 KB Created: 2021-08-09 05:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 24b08b53c22df3d5d4a938a30a0169f6 SHA-1: 87a0d6719def0bca91bf7cc998c42075bd7efef4 SHA-256: cf22ed30393b46657334750ad56aedfde2b3a5695dde55428dfa0f04c4a09d0e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or redirection scheme. The presence of embedded JavaScript, flagged by heuristics, suggests potential for malicious actions beyond simple redirection. ClamAV detection further supports its malicious nature, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mvdeastudio.it/userfiles/files/3930013331.pdf In PDF document text
    • http://movitecnic.com/ressource/site-image/files/58473584692.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/93809208347.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ebd8c3701---62174468427.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d08730dc3---xegonarofake.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/fokido.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/50370920280.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/11950699200.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774dd36f3b1---xufumak.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/93541440946.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb29b522ff2---zimagobokij.pdfIn PDF document text
    • http://soupworld.de/upload/file/risegovokozesizek.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/a5tjtjcnts46heeqne3596lbqr/71984156012.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608947b07cf56---50697551892.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/3336891340.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/91587112347.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/minikafewimara.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/d6df969d9986e3150ab1e9a8e9750d92/3464435791.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1f2229f51---98582021616.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083faaad1d9e---88818435842.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/jibej.pdfIn PDF document text
    • http://autofulltravel.com/userfiles/files/jedoj.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/13339613251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=gcse+chemistry+balancing+equations+worksheet+and+answersPDF link annotation

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