Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23370dbe915b8ce…

MALICIOUS

PDF

37.6 KB Created: 2021-09-14 12:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b996e32159715276b5297fc8ad0f7fe SHA-1: 086c35ae145808a3603af5d12f736b2f677a52d6 SHA-256: c23370dbe915b8ce418a5f3fb845f59a2a914965be89f0368963a1c2f66a0297
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

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 an embedded link. The embedded URLs and the PDF's structure suggest it is part of a link farm, likely directing users to malicious content or phishing pages. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7966

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.
  • 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://phayaotechno.com/UserFiles/File/44998511867.pdf In PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/26172409149.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/58077081021.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/namaruxexawalavorib.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jozopa.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/76755751995.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/49488243021.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319a1147755---zilavubibevusabifafer.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161371a3654491---98951760690.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/72658301052.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-cIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=hack+mech+warsPDF link annotation

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