Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3be9fcc2f8c568…

MALICIOUS

PDF

66.8 KB Created: 2021-02-11 20:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b11e124745f6d4be8a4f8678a6b8e678 SHA-1: 84a7bb6558b7fcd6aece300599ab29813f4b6d08 SHA-256: 7a3be9fcc2f8c56852b46d4af401b2ee46107048a64964c86baa06f474209efb
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/123?utm_term=neverwinter+searching+the+present+complete+the+analyze+order PDF link annotation
    • http://masito.space/wink_smart_home_ukfxubm.pdfIn PDF document text
    • http://covidcapsule.world/dabiwezagetasovg8.pdfIn PDF document text
    • http://rawenspant.online/super_fowlst_secret_charactersgb0ou.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/jiCIjdR/wild_kratts_rescue_run.pdfIn PDF document text
    • https://cdn.sqhk.co/buwisotubu/higigj9/wallpaper_hero_mobile_legend_perempuan.pdfIn PDF document text
    • http://speak4pro.com/tupugajedugalafuvovafim9r4p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_60244dade1f26.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/nusepige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404123/normal_6000867251480.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/ih6if1Q/igo_mobile_navigation_update.pdfIn PDF document text
    • http://electorat.org/definicion_de_proporcionalidad_directa2xwwn.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/6b21Ywj/zisaladutevi.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/tedab-somiturofu.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/pilazi/69694888242.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/taiwan_visa_application_form_2018.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_off0000ca66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA66 5760 bytes
SHA-256: 6edd99e125d8c3c60cd7f6ea61fd92d1385c8b4928d670408db13cc2c28510ec
font_01_sfnt_off0000ddfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 9304 bytes
SHA-256: fcf4103ef5df4527cab34a74164ee250a230b78a254538620b84142699d9488f