Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f405e909a899835…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 16:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b94d99ba459067023a3760120ffdf9 SHA-1: 785c22d213c74ba3e06c78eff222fcc0283e6ba5 SHA-256: 9f405e909a899835f34034502e5c43d938833bc8fa8ed413647b267933c895cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing operation. The presence of the URL 'https://mezovuduw.ru/aws?utm_term=chartered+financial+analyst+jobs+in+india' indicates a lure related to job searching. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/aws?utm_term=chartered+financial+analyst+jobs+in+india
    • https://megudetezibiso.weebly.com/uploads/1/3/0/9/130969982/2883639.pdf
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5ff600c8e51ed.pdf
    • https://static.s123-cdn-static.com/uploads/4465702/normal_5ff6313ac79e7.pdf
    • https://static.s123-cdn-static.com/uploads/4482191/normal_5ffb70c582e9d.pdf
    • https://cdn.sqhk.co/libibajuzumu/bicM4jc/28137781172.pdf
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/ef09fb71def7.pdf
    • https://cdn.sqhk.co/jefapukawore/b49gdif/73796431634.pdf
    • https://cdn.sqhk.co/baruduwege/qjash6C/lost_island_blast_adventure_mod_apk_download.pdf
    • https://cdn.sqhk.co/tororukiwuri/hghcQgd/monument_valley_weather_september.pdf
    • https://xemalijojododud.weebly.com/uploads/1/3/0/9/130969235/vufakadudofodi.pdf
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fe594cfcfc2c.pdf
    • https://cdn.sqhk.co/xixujipum/cigtEhi/descargar_aplicacion_recarguita.pdf
    • https://cdn.sqhk.co/puburikob/yhgsYPZ/dragon_shooter_games_download.pdf
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ff9ac512aacf.pdf
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/19549bc.pdf
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fd2053ed4466.pdf
    • https://cdn.sqhk.co/rosubeno/FjjZT38/nintendo_snes_mini_controller_extension.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ac822a7e-0560-4275-af0c-fe11e629e71d/41083390820.pdf
    • https://uploads.strikinglycdn.com/files/84fd42e2-55e9-4be2-96f4-8d50b32307cd/georgia_tech_online_masters_data_science_cost.pdf
    • https://uploads.strikinglycdn.com/files/a3835a0b-514e-4dc6-aee4-7f108bacfca1/12096300141.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f262.bin
05e10eba1354ce7b119550dac629b48268fe1edfe0e087f05a7c94c203264dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5332 bytes
font_01_sfnt_off00010485.bin
2d327c03c49519c2c41e264d520bc2a14ef299195f8d8be14e62d934e9d8609c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 10600 bytes

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