Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac892edd3a352171…

MALICIOUS

PDF

83.4 KB Created: 2021-03-22 01:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e995d3f0366a3b8c85ff511752a25167 SHA-1: 229227295783e8f33876bf44e18ed73aa9e23f5d SHA-256: ac892edd3a3521718450247152df8762f5d1fd2895cd30370e69296ae5f8c2fa
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=is+a+marriage+in+jamaica+legal+in+the+us PDF link annotation
    • http://mebovaduzi.mywebcommunity.org/krk_rokit_5_g3_studio_monitor_pair_5_inch__stealth.pdfIn PDF document text
    • http://defupezive.iblogger.org/pubupod.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/halo_effect_marketing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_6057c1f718caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fe929d863d6f.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/8DUjczG/gladiator_vr_game_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/jeAqeo7/durizuk.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/foundations_of_genetic_programming.pdfIn PDF document text
    • http://ruwakus.22web.org/fm_global_approval_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/ibdA4jg/fox_theatre_atchison_showtimes.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/bokufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_60251ca9b5b52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_60015518f02c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowumurukilada.rf.gd/checklist_template_project_management.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/kumon_answer_key_level_k_math.pdfIn PDF document text
    • http://sejigesenevemi.epizy.com/65655297433.pdfIn PDF document text
    • http://kuvuzoruzanawip.epizy.com/how_to_connect_focusrite_scarlett_solo_to_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/cctools_7._0.pdfIn PDF document text
    • http://gobujabolonile.rf.gd/gukujesonatekupepoxel.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/penigobuderozegofa.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/insider_ai_marketing_growth_management_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/87012945268.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/xidilotar.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/39365819586.pdfIn PDF document text
    • http://torobedi.epizy.com/how_to_make_a_server_in_minecraft_1.16.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_off00010905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 5224 bytes
SHA-256: d28c2162fac53da0d3c268ec6b034d03f76f11f677cd28b0d969f210edbe7103
font_01_sfnt_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 10960 bytes
SHA-256: a9cf120d8a26a363bfbf9f756dc2fcff97432198aab6546e39ceb7f201b28d81

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