Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6632d94ff8043b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-28 00:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d36ac4472a28d40b9fa460ae03adf915 SHA-1: 30cf016115e6cc3c754c2dd6102afc2da6b6584b SHA-256: fc6632d94ff8043b653d2e39b3c5dabc8601397cecfb1dac3394568f121632fb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such sites for malicious purposes. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=english+academic+word+list+pdf PDF link annotation
    • https://cdn.sqhk.co/ziveluki/ehbPgck/fonts_download_for_word_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/ddtmDeP/vovobe.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/19849627044.pdfIn PDF document text
    • http://itawegan.space/mass_effect_gibbed_save_editor_guideq6t0x.pdfIn PDF document text
    • http://hookup753.fun/numabulilebajelesuinqwb.pdfIn PDF document text
    • http://tozidak.mygamesonline.org/48538704536.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/tAuhdha/68513950485.pdfIn PDF document text
    • http://productwood.ru/strategic_management_competitiveness_and_globalization_13th_edition_citationgvis3.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/dghCH3z/global_marketing_manager_salary_texas.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/hindu_festivals_calendar_2020.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/94197990360.pdfIn PDF document text
    • http://moneymaya.site/mecanica_de_suelos_y_cimentaciones_crespo_villalazhse64.pdfIn PDF document text
    • http://yildirimotobursa.com/xofiropiremabafotogeziloya9d.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/fjatuWi/peruluwitofirofopisigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womawujun.atwebpages.com/difference_between_hero_4_silver_and_black.pdfIn PDF document text
    • http://buwifojozoziden.atwebpages.com/22035544.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_555b82143f54478a8999ea5fdfa3b2be.pdf?index=trueIn PDF document text
    • http://gozidonozali.myartsonline.com/lima_barreto_lilia_schwarcz.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_b3ad521fbb9840a095f3f447835332fe.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_7767f92ff1b14b38a7cefcf11cd08cfb.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_695b9a460f174d68a1ea4c190363b6fd.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_11479ce42c314b9baba2193461880adc.pdf?index=trueIn 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_off0000fda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA7 5620 bytes
SHA-256: b3c6d85dc23db49fb4373118a137eece335fc6eaf572d94ad009be5aafd90281
font_01_sfnt_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 10840 bytes
SHA-256: cba5f5f13f0fc0d6fc2da3461fd0e4e061a485e802b8fd2390548906de99f715

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