Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce3e4389342538a…

MALICIOUS

PDF

39.3 KB Created: 2021-06-17 13:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 004cafd61329343b34efc4f0c34c6405 SHA-1: 18afdb34d2a41799aff5b132b7ba838b071993e8 SHA-256: cce3e4389342538a0bfb20d85a33903b28fcdbd6e6bef694b4ae5fbc26580034
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7261

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 39 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 https://theatresaucinema.fr/uploads/file/77187866647.pdf In PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160847e5d3a63f---34095682455.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/31652770705.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4d32201fc0cb2cce5ea6c8946c5d372a/3228838785.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/13105229495.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/81046677268.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9cf28eb65---lisavujexeveraxus.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/91d5b9b55a22a01f3e83dfd969252f08/71369541795.pdfIn PDF document text
    • https://menu2uplus.com/images/file/55061014010.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/barizarasukojupi.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/12193585015.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/58080894322.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/n895tfnfc5b17aic6n55lg7aeq/nosudaperupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gizmo+advanced+circuits+answer+keyPDF link annotation

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