Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63304238dbffbc0…

MALICIOUS

PDF

48.4 KB Created: 2021-09-24 01:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ad173c17084e95550625f5a4b7c989ba SHA-1: e05720f230628bb2b9951b879c8db7e691e75b70 SHA-256: e63304238dbffbc0df6203c064e739cbc31bec4c54a54e0ef30688742f14ce84
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to external PDFs hosted on disposable domains, indicating a link farm designed to obscure the ultimate malicious destination. The presence of multiple unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7185

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 http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b411c28a1b---41759083730.pdf In PDF document text
    • http://csc0535.com/userfiles/file/20210920062734_78yv6e.pdfIn PDF document text
    • http://valosagoskincsesbanya.com/upload/file/97609050670.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/25434194853.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/91680256423.pdfIn PDF document text
    • http://skupka54.ru/upload/m/66318124081.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/59004778372.pdfIn PDF document text
    • http://skncn.com/u/files/vafofipijogamoboma.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403a397901b---viwinizekunezedavovefive.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/gamixowolunapi.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/taxakusig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=csr+2+hacksPDF link annotation

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