Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8baf79fb5cda65a…

MALICIOUS

PDF

38.7 KB Created: 2021-09-19 13:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aabf23ea13ac16a0e8c8e5f642fd17f2 SHA-1: b4920adadd71c88a2c9cc82a20b138cbbeee8a9b SHA-256: f8baf79fb5cda65ae602e7ab9d1164abba46938b64304cb3edb04321d740ca92
174 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only interface with a clickable action, typical of attempts to redirect users to malicious websites. The numerous embedded URLs pointing to compromised CMS uploads and disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/xuvuvudovituteweput.pdf In PDF document text
    • http://rentbucharest.net/images/userfiles/giwemoxil.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614416d73277d---25405459485.pdfIn PDF document text
    • http://www.polni.si/Images/files/bemudeg.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuroxonatunevuretexifov.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/52693701150.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/kojejitelovokeviti.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/96a05780ae85b9e1a82f433f2282631b/32479903366.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/mepozakuw.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9d8154c201c0e8dbd8e43796706d0f4b/pobogoroselijuputipovak.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/62332615530.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109022129217694.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/pipimobirokulegazuluvo.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/roremosabuwemuwevil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pc+monitor+app+androidPDF link annotation

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