Malicious PDF — malware analysis report

Static analysis result for SHA-256 366c7d3334e69b12…

MALICIOUS

PDF

72.7 KB Created: 2021-01-19 08:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 631fb81791f782988b06003f229d05e1 SHA-1: 75f2f726ce05ae436af19b276ddfc0d4d4166e77 SHA-256: 366c7d3334e69b128082831c3dded46176534cd55dfc1793257c880dae464c16
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=enchanting+leveling+guide+eso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5fbd57d696f2f.pdfIn PDF document text
    • https://site-1214293.mozfiles.com/files/1214293/poxakoxed.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/como_hacer_una_auditoria_informatica_ejemplo.pdfIn PDF document text
    • https://site-1236897.mozfiles.com/files/1236897/items_guide_teamfight_tactics.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/Fhb5hjH/zubojeketenomunozewa.pdfIn PDF document text
    • https://site-1172743.mozfiles.com/files/1172743/analytical_techniques_in_biotechnology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd905163f8bd.pdfIn PDF document text
    • https://site-1180550.mozfiles.com/files/1180550/sawewudozopijod.pdfIn PDF document text
    • https://cdn.sqhk.co/namemedoxake/f9hehi3/star_wars_ziploc_containers.pdfIn PDF document text
    • https://site-1168038.mozfiles.com/files/1168038/adjusted_gross_income_on_irs_form_1040ez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413000/normal_5f95e91d83b1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipuxogililego.epizy.com/87508785769.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/tofivewujarenomaper.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/can_t_find_amazon_order_history_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/template_for_meeting_action_items.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_off0000dfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 5124 bytes
SHA-256: 6af91fd0add9f40580e77e6096110ab2968ff05a9cc18a672c6304cc307306df
font_01_sfnt_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 10836 bytes
SHA-256: 623fb75951cedb645697b2c98eaa40b4b81e9b9fb797bb10c08ba54d4f82fc2b