Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e5f5fb91b4399e…

MALICIOUS

PDF

90.4 KB Created: 2021-02-28 14:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ac954c515d751bffdcde8ba8b21f6c2e SHA-1: 869a7dba9eecd6bdc69b84a25ec0dc3ffa64bd7d SHA-256: c0e5f5fb91b4399e5038193b7a18685c7ef1a79dc310de21ecd343f587d3471c
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 0.9998

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://ponafet.ru/wix?keyword=trade+reference+means PDF link annotation
    • http://tejovotemikodes.getenjoyment.net/xbox_one_console_deals_call_of_duty.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/ihgcjfJ/how_to_unwrinkle_your_shirt_while_wearing_it.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/20731833848.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/ranatagejumidejuqk8z9.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/braun_coffee_maker_error_e01.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/xugesuw.pdfIn PDF document text
    • http://summer-italy.fun/salajumezabulijibwl3ec.pdfIn PDF document text
    • http://milesnires.xyz/gijivenonorinoxibazedi3pz9a.pdfIn PDF document text
    • http://lifeeuro.info/cash_flow_statement_analysis_examplepu54l.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_use_omron_intellisense_wrist_blood_pressure_monitor.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/at_the_cadian_ball_feminism.pdfIn PDF document text
    • http://1ux.site/tunekaviwoderekokovogezubkf5fm.pdfIn PDF document text
    • http://lastmarkt.ru/jacoco_report_exclude_package_gradley1wgy.pdfIn PDF document text
    • http://migerov.xyz/learn_easy_english_grammarl9gf2.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/fg1ktgN/skyblock_server_fur_minecraft_pocket_edition.pdfIn PDF document text
    • http://ig-objectionform.com/roomba_960_imprint_smart_mappingargf5.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/sanowozapoxoweloduxafe.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/language_development_an_introduction_9th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/17427514175.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/16499675259.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_off00012743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12743 5084 bytes
SHA-256: e86b3f6e1b044200db4a0f69ec5cab7f341f795bf7018295a5b2043781fd7b95
font_01_sfnt_off00013877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13877 10424 bytes
SHA-256: 1d1b25361f0bad0a995cb3a5a208cb192701c0744c0439d8a58e2568c241f899

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