Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bad08416790bf95…

MALICIOUS

PDF

44.6 KB Created: 2021-09-01 03:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf8ea3d5c3dfce132c6abe6a23172f39 SHA-1: 2cb2331908fb6660f1fe7a97a87115e7ad0f07d5 SHA-256: 1bad08416790bf950d479167f07dcf81364de988717efbb695866cd44605e8d2
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is part of a link farm hosted on compromised WordPress sites and disposable domains. This suggests the document is designed to redirect users to malicious content, likely for phishing or to download further malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6729

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://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/18105934508.pdf In PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/325316284f9cf373d34e18786f6fa997/nidikaxerigomodezob.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/rasegavifetemogemexipan.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/56aa3a5ed8992f76b7e684fa09b69147/93008202691.pdfIn PDF document text
    • http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/50525314552.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609451d68934d---sobubujebabiweguwu.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/tebobenenajo.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/49446413502.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/67295517104.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=apartments+in+brooklandPDF link annotation

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