Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ba40b9658b30f8…

MALICIOUS

PDF

61.7 KB Created: 2021-02-17 23:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d7401f47ef861259341dcdba73cb4fb0 SHA-1: 1e75ad919bdd64043cc331e3069026dbfab0138c SHA-256: a9ba40b9658b30f8ec3b475de0a5fd06c27bd46b603a80c71e2f6a59b51f06f6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/wix?keyword=diary+of+oxygen+thief+pdf+download PDF link annotation
    • https://cdn.sqhk.co/bidogefapo/HHtvggJ/wofipupomariruvi.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/9415245.pdfIn PDF document text
    • https://lusebedadejaxid.weebly.com/uploads/1/3/1/4/131407110/zevixebusoguziz.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/iiheIhe/hockey_monkey_locations_ca.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/bavilefegi.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/4696066.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/uXjggiM/ballistic_missile_defense_command_and_control.pdfIn PDF document text
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/7969572.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/jgj3jdJ/jumuboxosafubu.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/tifusidipowewu_vebozolewinuze_vigoxewaxeped_jilesilubeza.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/iahhhga/8bit_mercy_real_name.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/1977625.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/duhhjhm/draw_the_flag_register_format_of_8086.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/Kgdonhd/top_up_my_three_sim_online.pdfIn PDF document text
    • https://nukanomipixi.weebly.com/uploads/1/3/2/7/132740264/lupalagisexotuwi.pdfIn PDF document text
    • https://runewabelew.weebly.com/uploads/1/3/0/8/130813516/vavapofawigobadujep.pdfIn PDF document text
    • https://sukorason.weebly.com/uploads/1/3/4/5/134578332/4819706.pdfIn PDF document text
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/f1cd9446c4b5b.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/Fjh5giG/zanop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D0 5384 bytes
SHA-256: b39c08733074f0eda96045fdb7f9cbb8ba1fed88cae872c7597ca82413195219
font_01_sfnt_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 9828 bytes
SHA-256: 475907fb500a3b2b50e3d3c105677c2d50282e3218033ca4ab8139fb45f81400

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