Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11a267067ee745f…

MALICIOUS

PDF

91.4 KB Created: 2021-06-09 00:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 39fe1287cc97b40a6612719c92b9cdf3 SHA-1: 29e5fe219e0ef4b9ab9ed3782d6e44cc2a9d2637 SHA-256: b11a267067ee745fa161fd4d55d5640604fc6545b164341136cb1155a7c707f3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('oniceh.ru') that is flagged as a link farm. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing. The document's structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://oniceh.ru/pbw?utm_term=the+book+of+life+all+souls+trilogy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461511/normal_600a400a14cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460709/normal_60bf2f628c376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fc8bf05c47fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_60381e9f6fb67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwedano.pbworks.com/f/how_to_value_charizard_pokemon_card.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/w/file/fetch/144509139/lewulepazapasagori.pdfIn PDF document text
    • http://kufugaref.pbworks.com/f/what_is_financial_awareness_in_bank_exams.pdfIn PDF document text
    • http://gorixose.pbworks.com/f/on_the_genealogy_of_morals_kaufmann.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/werunuvibemuvolamol.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144641391/where_is_the_transmission_speed_sensor_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1a2e23-2342-4883-8bc0-b7a33d288994/sub_zero_model_642_manual.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/luzidepuvosukigixedab.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/w/file/fetch/144540294/how_you_say_carpal_tunnel_syndrome_in_spanish.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/how_to_draw_a_mountain_landscape_for_beginners.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144621684/15738424836.pdfIn PDF document text
    • http://pudamalulera.pbworks.com/f/2018_toyota_rav4_factory_service_manual.pdfIn PDF document text
    • http://zevatirupura.pbworks.com/w/file/fetch/144626862/85359250639.pdfIn PDF document text
    • http://zidedabi.pbworks.com/f/97813104376.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/list_of_chemical_formulas_and_names_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4cc27e-bc83-4da7-9b80-7ec8b2257ff7/88913419419.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_off00012a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A59 5560 bytes
SHA-256: 8caee2ad42041641eed326f3cf1cb4ac68b4244caeb6a80f2bb52951f9761c00
font_01_sfnt_off00013d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D41 10304 bytes
SHA-256: 792a7c0c96a818885f462000be7b715dba18804bb7867878be028c3007c03375

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