Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f27019ff269444a…

MALICIOUS

PDF

66.1 KB Created: 2021-04-17 08:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ca5d167ab73d70b1b6f882b17af34d31 SHA-1: b566f1afc2d6dc6c8c92b98272e2595188a8fe8f SHA-256: 9f27019ff269444ac2ebf89f443170fbb6e152916905052bfae0b8038f9e08cc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier also flagged this file as malicious. While no scripts were explicitly extracted, the presence of external links suggests an attempt to redirect the user to malicious content, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5377

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+long+does+it+take+to+study+for+mcsa PDF link annotation
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/gamilexus.pdfIn PDF document text
    • http://lobutojumakix.22web.org/diziwexivurinapovumezolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_60651646641f5.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/posuregupegumewamef.pdfIn PDF document text
    • https://jomagikovire.weebly.com/uploads/1/3/1/4/131408086/3659725.pdfIn PDF document text
    • https://dawerofe.weebly.com/uploads/1/3/4/3/134361643/4331300.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/does_medicare_pay_for_life_alert_buttons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_5fe1f74ae24ca.pdfIn PDF document text
    • https://darugagoremu.weebly.com/uploads/1/3/4/5/134588092/tusonafobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1250fafb-f7db-4418-8b55-0d16dabe7d9f/fubisa.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/bezakafagofilesuwuvivi.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_292ae930f5824a0ba0b55f74f5f60e54.pdf?index=trueIn PDF document text
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    • https://s3.amazonaws.com/tufitijinexu/zakojufakozepizomekuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c72d3a8-db96-44f1-8b4a-23d722ecdb76/what_is_the_purpose_of_policies_and_procedures_in_the_workplace.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_d2c6d29952a5481fa3cd49033f06b12c.pdf?index=trueIn PDF document text
    • http://jopuzasoxu.rf.gd/roomba_595_battery_reset.pdfIn PDF document text
    • http://kojuvubij.rf.gd/why_we_sing_kirk_franklin_mp4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed60263-9395-4e32-b579-83eab5f40682/john_deere_js63_price.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_f0710ea0ae8749169bd62f49918af5b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/942e0b64-312a-40a4-a938-e28516047bc2/59624547147.pdfIn PDF document text
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