Malicious PDF — malware analysis report

Static analysis result for SHA-256 2350339fcb6eb03e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-07 03:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f3858d976046fcd92640f4e3f95cfc34 SHA-1: 3656b6c259ff04c486e0c72f486c139a97d1cda3 SHA-256: 2350339fcb6eb03e4c2d22a27bdf14fbd4738c993196e84d1ba14a27d6d3a60b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs, particularly the one to 'jumiwimov.ru', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://jumiwimov.ru/award?keyword=asean+economic+community+journal+pdf PDF link annotation
    • https://pofofeteb.weebly.com/uploads/1/3/2/6/132681268/01dfb3115.pdfIn PDF document text
    • https://xojenupikubola.weebly.com/uploads/1/3/4/7/134747345/6840188.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/03a5405520.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/80460736029.pdfIn PDF document text
    • https://divojalu.weebly.com/uploads/1/3/4/6/134664609/6068513.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/malegekasojomofomi.pdfIn PDF document text
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/a327fcfd4e.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/pdf_calculus_ii_for_dummies.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/8558756270.pdfIn PDF document text
    • http://fuzabura.sportsontheweb.net/3816986147.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/mijegidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midipes/faringitis_viral_o_bacteriana.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/easy_things_to_draw_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/zigujenuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/fazufijovamizubarur.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/gurgaon_weather_report_now.pdfIn PDF document text
    • http://lerumedinopox.onlinewebshop.net/1005707160.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/graphing_quadratic_functions_a_3-_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/bard_guide_3._5.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/walmart_grocery_delivery_ebt.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/lubugezorijobi.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/77683039539.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/plantronics_backbeat_fit_350_bluetooth-sport.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/play_online_car_games_free_without_ing.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 5468 bytes
SHA-256: 671e00e945ee05587632515122568442a38f49da49082b997a7b17d92e416deb
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 10936 bytes
SHA-256: 63fca77d3f80dc1cff3c724ccb07a8ba7a1d9bb93c1bbb6496d2e4bf7ae04efb

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