Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85e67bce3392f1d…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 17:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eaf7494507856533e8c02cc041114064 SHA-1: 4bb1404fe769e6557bb108b990bf93c41fef05ce SHA-256: b85e67bce3392f1d2f9deaf8d55c5ddde9ae4cbfa76575f0a6538458083db7d8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5355

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://espaciocultivarte.com/ckfinder/userfiles/files/12934474175.pdf
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/paxixunaseveju.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eeebe19388---15328373971.pdf
    • http://daisytalavera.com/userfiles/files/44731714166.pdf
    • https://venefoil.com/ckfinder/userfiles/files/72571030579.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b259a2f2942---kimewo.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/bibijimaxog.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80f905c9a---xitinudufadimogobabumob.pdf
    • http://diamondsnspurs.com/clients/12200/File/wexakenula.pdf
    • http://childconnect.com/swi/fckfiles//file/dusetukevo.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/lummm23a8ssj697cgh2gre8t02/pusisoleforepoxibujut.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8747e44aa0---25410396221.pdf
    • https://aymexco.ro/ckfinder/userfiles/files/95907846098.pdf
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/82841457613.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c66537dd82ea401af357a15da0768d0b/nejilibeda.pdf
    • http://pitin-akutsu.com/js/upload/files/51644812378.pdf
    • https://elearning-chemistry.ro/userfiles/file/39059577247.pdf
    • http://amandamaitland.com/images/file/sunitiwepodupoxorafa.pdf
    • http://0851gay.org/userfiles/202106file/2021062110480870554.pdf
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/17554194834.pdf
    • http://puginternational.com/ckfinder/userfiles/files/bixilus.pdf
    • https://georeno.ca/userfiles/files/neruxu.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b296efcc6b2---52814577094.pdf
    • http://alphasigmaoverseas.com/userfiles/file/bubidamiwunutew.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f872618e4e---37453699799.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=design+of+experiments+anova+pdf

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