Malicious PDF — malware analysis report

Static analysis result for SHA-256 055fd0baf7e3c143…

MALICIOUS

PDF

37.2 KB Created: 2021-09-05 00:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72bb99a2c826257989144564cef5e74a SHA-1: 5ed4324491f1f2fbf985367bc19b41ba1c57a165 SHA-256: 055fd0baf7e3c14320069ff8e84fb98b61eca6c98d5e9859065fdee8d3ffccd3
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking a malicious link. Several URLs were extracted, with many pointing to compromised CMS uploads, suggesting a distribution network for malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6864

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
  • 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 http://grandviewgroupresort.com/upload/files/80761083019.pdf In PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b700f47f4e---40810779633.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/85519687461.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/66438959897.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/97635908774.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160da4ed67e715---76523076356.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ec5777edf---zugaxufisakopimirufas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=evolis+pebble+4+user+manualPDF link annotation

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