Malicious PDF — malware analysis report

Static analysis result for SHA-256 8095c2b8fdeeee73…

MALICIOUS

PDF

75.1 KB Created: 2021-06-01 12:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 88664e3e075a9fcecf05bb98ef206558 SHA-1: 2975dba9cbbaa03434c86755acc74824909dbe57 SHA-256: 8095c2b8fdeeee73584db2fe66058149e53a0c08a3f18682dae66e2720287282
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a phishing and ML-based detection. The primary URL suggests a phishing attempt related to financial services, disguised as a search result. The presence of PDF-specific heuristics indicates exploitation of PDF vulnerabilities or features to deliver malicious content.

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
  • 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
  • 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://crysiq.ru/pbw?utm_term=is+revolut+for+business+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446650/normal_6026b3a895f5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_5ff361d9bcadb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_6068bbeed0800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366661/normal_5fde75a1a1ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_605ef54429d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_60171d81c7af8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144426147/temekaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e61ed2-54d3-4cf5-9d54-1076c7b13846/exponential_inequalities_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7934aa9-4973-4504-aaea-2a1ee06125fc/how_do_i_identify_a_ford_transmission.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144411861/buposewetibezis.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/bull_bar_spare_parts.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/accel_world_light_novel_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce0ef06-bba4-4d68-a454-14ea960208d6/adventures_of_tom_sawyer_summary_chapters_8_to_14.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144454248/molodawaxixutirib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a7e261-c70c-4111-b624-0ccb291d438b/dagikosoluwelowexezedo.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/tibalal.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144416121/62949240049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e771223-7a85-4f6c-916d-861df6899810/compilers_principles_techniques_and_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b095a63e-c740-4b30-be2e-8fc7a5228636/how_to_mix_curtail_m_herbicide_for_lawns.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144426261/angular_custom_form_control_ngmodel.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_off0000e646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 4688 bytes
SHA-256: 3481758a2f8777097de70ad651ed94bf1f98c4f1324b60184d4afc44b16948be
font_01_sfnt_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 11616 bytes
SHA-256: dbd3086f741dc3797918dc68e7211c28f2b6de70bf4ea258db3c53c7b073ad3c

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