Malicious PDF — malware analysis report

Static analysis result for SHA-256 8724b53d413f3353…

MALICIOUS

PDF

79.8 KB Created: 2021-02-28 15:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c186d7c9a4739bd14e0102ca4ea0fc8d SHA-1: d724f9f95fcded88b2d985cbdb13a1eeb03c50a9 SHA-256: 8724b53d413f335390ff4efc519a2ef4a8160cebe79cb0dc8f3a3ba9f7252cb3
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one specifically pointing to 'jumiwimov.ru/award?keyword=hansel+and+gretel+film+trailer', suggesting a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=hansel+and+gretel+film+trailer PDF link annotation
    • http://gadatoreneperil.mygamesonline.org/kizofisidugifijavuto.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/core_java_interview_questions_download.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/99681826275.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/how_to_fix_volume_on_directv_genie_remote.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/blood_bowl_2016_rules.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/line_6_spider_v_120_vs_240.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/13823169895.pdfIn PDF document text
    • http://getizibibi.22web.org/spanish_verb_tenses_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibemodida.myartsonline.com/what_is_the_significance_of_the_social_contract_theory.pdfIn PDF document text
    • http://sorofakomefus.epizy.com/how_long_did_a_play_in_greek_theatre_last.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/golf_outing_flyer_template_word.pdfIn PDF document text
    • http://vajavugozuw.epizy.com/27941789118.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/how_to_calculate_the_volumetric_flow_rate.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/morixunadulisikuzo.pdfIn PDF document text
    • http://mabazekow.epizy.com/56874862733.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/how_to_reset_combination_lock_on_briefcase.pdfIn PDF document text
    • http://gafodix.myartsonline.com/84747750873.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/alte_uniformi_carabinieri.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/vesavipi.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/53452984663.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_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 5188 bytes
SHA-256: ac31afd7faf1e8b57ad031b32910a11bc5415929f46899b48ff75230e17165bc
font_01_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 11312 bytes
SHA-256: 1306cc8d65dd690aac67217dfb70357e7a198fdf194b8141e673260d6aff4f55

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