Malicious PDF — malware analysis report

Static analysis result for SHA-256 a706b1b03601cb7f…

MALICIOUS

PDF

51.1 KB Created: 2021-08-19 12:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 45acb854b81674848c6c0497625be561 SHA-1: 97289ca197ea903244accd5d59d70303e9d52ef8 SHA-256: a706b1b03601cb7f7ccab2b47a84d4d9c4fe53031d2dd2dde0d04e1c5e09550c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5525

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=chase+freedom+unlimited+benefits+car+rental PDF link annotation
    • https://peilimineko.com/userfiles/file/dakenifupozali.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/zudazozexojod.pdfIn PDF document text
    • http://learningkey.org/userfiles/fapudinux.pdfIn PDF document text
    • https://hongmao.tw/uploads//files/202108041251453783.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/89072633674.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/4941856303.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/27695639467.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/kipafimavetirizejum.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96a4a3cd7---17242341780.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/xobavikede.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/4b9ff48838752bb7474c25b28ef766d2/45262500380.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/379885f5169c7ebe6f5In PDF document text

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