Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfb52b3e6f0c397…

MALICIOUS

PDF

37.6 KB Created: 2021-06-29 23:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0b8c73a7bdce81be21d132b28bae6d06 SHA-1: d242f1056de40dbb61537468667cd6a4c301c20d SHA-256: 3cfb52b3e6f0c397ac08a1ab14b44cb36ea97a4e3a416ca933402a9e6b621a4a
144 Risk Score

Malware Insights

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

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains multiple links to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The PDF_IMAGE_LURE heuristic indicates it may be an image-only document designed to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

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
  • 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 37 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.
  • 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://coretry.ru/uplcv?utm_term=the+pirate+bay+pc+games PDF link annotation
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/4265f3e90267cbc3384c8747cdfab0ba/26722980105.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff1fe8d2c---45943582588.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/nefomijipupaf.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7eade5ce688c2cb432e3fa60eedb9638/dejikitozotevilifiwu.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a57254bf1a2---futoz.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1dp1nugi4qgbuodktpegp5v6c7/41672119267.pdfIn PDF document text
    • http://hospvetcentral.pt/site/upload/file/gefebe.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac98c62bafe---zifikadiw.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/xidumonafosepudugefam.pdfIn PDF document text

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