Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a72a5f9e29d4ba…

MALICIOUS

PDF

38.5 KB Created: 2021-09-26 01:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 32b4749ced2b62bc0e6e0424e7d57640 SHA-1: 74acea227fa77b066641e5f537dfad971cf0b74a SHA-256: a4a72a5f9e29d4baa87f69c98a4d7cd192827d8469aeadcbb60d34b7d80b0361
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable action. The document body is heavily obfuscated, but the presence of numerous external URIs and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

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 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.
  • 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://geodavidepini.it/userfiles/files/kazepeso.pdf In PDF document text
    • https://laps.pl/userfiles/file/59923826216.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/42b4eaaf90d6f9ab5ed7102ec1b4e74a/filaxebaxativesexorugox.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/89522084630.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/97197151699.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/lobidejojutirige.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210901132221.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/gudix.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/tofipinijugixabuxabafaman.pdfIn PDF document text
    • http://tercovci.cz/files/file/lufirotili.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/nuvero.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/18776212236.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5830ec66e---rurijevoko.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/noruzokeIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=jump+force+apk+obbPDF link annotation

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