Malicious PDF — malware analysis report

Static analysis result for SHA-256 57078cee7c6ba478…

MALICIOUS

PDF

44.5 KB Created: 2021-09-10 12:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3f74acc3df29205025686140e5b52755 SHA-1: 3a43f33b7e5ee83c7a583adae4f7b3500026fb71 SHA-256: 57078cee7c6ba478642c18d37be10810bb16dc40418a98ee9c199915eccde771
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The PDF also contains numerous external URIs, many of which point to link farms hosted on various domains, suggesting a phishing or redirection scheme. The ClamAV detection further confirms its malicious nature, likely as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4178

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bright-inter.com/file_media/file_image/file/mujumesibixed.pdf In PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/kadowenu.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/6869082999.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/76325735404.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/nodifunubomuvixi.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/nikasibakiperi.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/tovazimepobikiw.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/nonuzulem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=android+sdk+8+downloadPDF link annotation

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