Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa53b23316086c2b…

MALICIOUS

PDF

43.5 KB Created: 2021-02-26 01:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 916172eddc8fa38af329e2d36c37db09 SHA-1: e6d5ab48cbfa97cf23fff0a740039a420d5f0a2d SHA-256: fa53b23316086c2bb06bb45e6c4fd7f1fbb40132088868883835f77100be988d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to various domains, many of which are hosted on disposable or free hosting services. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on such platforms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5026

Heuristics 4

  • 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.
  • 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://jottigo.ru/award?keyword=how+to+show+your+patriotism PDF link annotation
    • http://esclub.pro/free_printable_thanksgiving_math_worksheets_for_middle_school0rxz9.pdfIn PDF document text
    • http://vinadulateg.22web.org/any_admin_3._7.pdfIn PDF document text
    • http://nawilojobate.iblogger.org/cast_of_willy_wonka_and_the_chocolate_factory.pdfIn PDF document text
    • http://ludugomawetus.22web.org/53916349148.pdfIn PDF document text
    • http://winelorasagi.22web.org/zifededusobi.pdfIn PDF document text
    • http://topukonas.rf.gd/89134672503.pdfIn PDF document text
    • http://towilisok.epizy.com/soxoxuler.pdfIn PDF document text
    • http://nupenujopufidi.epizy.com/12726705445.pdfIn PDF document text

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