Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8df0b388c25f34f…

MALICIOUS

PDF

57.2 KB Created: 2021-02-26 07:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 577f5fa5714cb7211626c9a1ebfaa0e5 SHA-1: e2b0fe767e976635d2c483342cadee8162b40512 SHA-256: e8df0b388c25f34fbc5ec1568a740f3fc837aabee16484f227d05e65754a552a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', suggesting a phishing or trojan payload delivery. The presence of external URIs and a link farm heuristic strongly suggests the document's purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

Heuristics 5

  • 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 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://druttle.ru/award?keyword=cause+because+%25D1%2580%25D0%25B0%25D0%25B7%25D0%25BD%25D0%25B8%25D1%2586%25D0%25B0 PDF link annotation
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/mugenefemigu.pdfIn PDF document text
    • https://pidakulosa.weebly.com/uploads/1/3/4/3/134391257/dd188b47b1d.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/eaf6d.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/ahg6ehh/raxibobolatawaruzubikodon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_6027b75d5de0c.pdfIn PDF document text
    • https://wudufedowuton.weebly.com/uploads/1/3/2/8/132815791/193448.pdfIn PDF document text
    • http://wopafopu.22web.org/transformao_isovolumetrica_exercicios.pdfIn PDF document text
    • https://dupifexuxesopap.weebly.com/uploads/1/3/5/3/135348138/5472941.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/believe_in_me_2006_full_movie.pdfIn PDF document text
    • http://xinapigakumise.epizy.com/historical_data_nse.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/manual_de_usuario_casio_g_shock_5081.pdfIn PDF document text

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