Malicious PDF — malware analysis report

Static analysis result for SHA-256 749201f7fc5e3a01…

MALICIOUS

PDF

80.4 KB Created: 2021-05-10 01:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9969a33a2eced5045dbdf4f71627ac5c SHA-1: 0273245386009f7d1d260e4d430c5031d09343b7 SHA-256: 749201f7fc5e3a01df3057bdec54e4bda1219bf76a4219265b840231b32e3cdc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=how+to+install+dishwasher+brackets+kitchenaid PDF link annotation
    • http://nogivubuleduwi.22web.org/kulem.pdfIn PDF document text
    • http://zifixoribe.scienceontheweb.net/bestiary_4_pathfinder.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/epson_xp-820_review.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/19236663344.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/LtZhhpn/mods_for_minecraft_pe_android_oyun_club.pdfIn PDF document text
    • http://remileboj.22web.org/what_is_the_percentage_of_food_waste.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/6870256919.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/xusineg.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/jikisogojafonamuzik.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/ciaicBP/lindsay_denton_death_scene.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/time_management_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/vhbjehi/average_price_of_premium_gas_in_ontario_2019.pdfIn PDF document text
    • http://zikifogomi.22web.org/ibm_blockchain_tutorial.pdfIn PDF document text
    • http://wimebenese.getenjoyment.net/75646754824.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/jjThhja/mdard_value_added_grants.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/sizeja.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/payroll_accounting_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fesavuvab.epizy.com/what_is_comparative_research_study.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/list_of_legal_abbreviations.pdfIn PDF document text
    • http://wanudag.rf.gd/bangla_baul_gaan_hd_video.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/24847619670.pdfIn PDF document text
    • http://pejenusiloxo.rf.gd/how_to_change_battery_in_eco_drive_citizen.pdfIn PDF document text
    • http://jojomuge.epizy.com/creative_powerpoint_presentation_templates_free.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/fuwef.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_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 5284 bytes
SHA-256: a4ba10999cdc2b27a8980210a965dfbfa229bfb5162b25f3b76afa78d939886b
font_01_sfnt_off00010d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D23 10648 bytes
SHA-256: 1eaa16185ba46ab8f0715233a6efa5bada05ff7d6b6aeaf17d2570cf578f4974

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