Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b6bc07009ba936…

MALICIOUS

PDF

70.8 KB Created: 2021-01-28 23:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4c101dce79f40e39184a77922b950e52 SHA-1: 8b9b31e8ba04b19d2753f522b5f407df94088f0c SHA-256: f2b6bc07009ba9364afc21462c02d4f34ff9ea8f00606945cc6b1c6899b1359f
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=did+jesus+have+a+brother PDF link annotation
    • http://digitaltoolsfor.xyz/la_liste_noire_tvapgu5j.pdfIn PDF document text
    • http://tevfikyuce.xyz/skyrim_special_edition_infinite_loading_screenowccj.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/ihexJii/xuwofizikibojasuzetin.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/GjdCXie/why_did_juventus_change_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hjjifgf/vamalimevipimawoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/8icv8hc/disassembly_3d_free_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/uUheidX/no_man_s_sky_xbox_digital_download.pdfIn PDF document text
    • http://compte-cmbretagne.best/bupujoxenuradawojememixubdbg4.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/wmijPgh/wenojotores.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/jdhepji/jilewafokedititakemafob.pdfIn PDF document text
    • http://dressnbuy.com/valibinuzifunevitisine9.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/khdiage/89363329416.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/gSk4whe/today_s_news_cnn_ibn.pdfIn PDF document text
    • http://pelistens.xyz/fugope372x.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/hfgg2Ip/lost_echo_resonance_apk.pdfIn PDF document text
    • http://mebel-albero.ru/godmode_onsmjmh.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/p9kjbgi/71599510429.pdfIn PDF document text
    • http://teachost.com/tesakitiniserivawek952n.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/tifuwuw/bcbs_medicare_advantage_dispute_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/psd2_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/roxejed.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/bareilly_college_admission_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/11387797727.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_off0000d4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D9 5156 bytes
SHA-256: e1de8d130032cd63e24e294966f7e531b5a504680855487edb3a1b6b1c6035f7
font_01_sfnt_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 12044 bytes
SHA-256: 329d33758bc9f966c502e23a5f82e30f55b02814fcaf56da602d1ee2b35b2e13

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