Malicious PDF — malware analysis report

Static analysis result for SHA-256 f230ca94b58b4d96…

MALICIOUS

PDF

44.8 KB Created: 2021-09-19 06:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb3f7a17a59e759f37b4d2dfc73b5549 SHA-1: addbc1d8bbf45bc791a01cd9e50f32bebf8998c4 SHA-256: f230ca94b58b4d9614522a475afd37f39461b619790f9c54255515c00d0f3e1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a link farm, with numerous URLs pointing to external sites. Heuristics indicate these links are used for SEO manipulation and potentially lead to compromised WordPress uploads, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7306

Heuristics 5

  • 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.
  • 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://medvor.ru/uplcv?utm_term=videobuddy+app+movie+download PDF link annotation
    • http://loadcell.vn/Images_upload/files/nufejowalonil.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/midipetasap.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/36820387635.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/fakutopojoxoloveset.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/jugovosuvarufetiwi.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/gorubugasemefazoduwefataf.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/32636341751.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/73652701367.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331a594e0d0---zejarewonijizurujap.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/rijawukemaxapoxojina.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9bnoo5lshtrjbguoi61v4ftbam/simabarewawiwopabezubawak.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/98201950679.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/xinezi.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/34625693271.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/nb0i9n58phkvg6t7bnp5dda1ms/polofogo.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/b054c77b6a5dece65e1fa7e621557903/71765703995.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/86382300381.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/supowisunotexolapoxodiwof.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/49549528638.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/togozavetekusa.pdfIn PDF document text
    • http://chinalabware.es/d/files/70228325623.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/zefegaxilebudajuwef.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/10332703600.pdfIn PDF document text

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