Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b3a7f5eedf29f6…

MALICIOUS

PDF

96.0 KB Created: 2021-09-07 04:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87068ecd221c33d8f94407081fbd007a SHA-1: 553797fc8e72d5453cb4a45055b29d6dc61dd661 SHA-256: 89b3a7f5eedf29f6c842b1e960b631fc14cc989ddef16d723d31ba9ed8179a0f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. It contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to exploit users through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5505

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://whitesal.com/data/images/file/7896_20210524112514.pdf In PDF document text
    • https://chrmglobal.com/userfiles/file/faradijuxigejev.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/f0ab468a18fade33d1537f5ab430bd94/62722484321.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/ripovofujinoparedipubi.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/tezavojudatifek.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e48094a3d65d0a9781bce546475b5056/bipavalinevonenufigekiwil.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f854828785---lesatakujonitexalepela.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/rurawabosezu.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/toremegifijimadutorokeki.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/70743171005.pdfIn PDF document text
    • http://clubcrudupsonoma.com/clients/1/14/14cf715f5cd05ddba197ceaa5938d7d5/File/14104912649.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e94e2afed8---62524578231.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/pgk318320pdshopmn75tpnq2u3/32863203815.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16100d3f093330---guvepopemored.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/mugotupoxovubonireb.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ccdd403a3af8e928fd949a2de8b799c/93975992345.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/61497099480.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/bbd25f663c19ed8b646ceb5a095198b1/45494332704.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/ba7cb1861a2160a1f64a1ccf0fbc4b97/31361128802.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/59b988610f3213c2a3042646936d5c69/vedatotopevasavupareka.pdfIn PDF document text
    • http://scro.ru/pic/file/63547338190.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/2263171574.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/19837465391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=adobe+acrobat+javascript+open+pdf+filePDF link annotation

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