Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5914747be986fa…

MALICIOUS

PDF

84.6 KB Created: 2021-03-21 05:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 816c7d4d37ef12731578b776105f2724 SHA-1: 9a6d0bfa0d732c3b9111e30faf60995a3867fec8 SHA-256: 6b5914747be986facba3db17314448db5b12971e1ea8c892feaf988fa1c7956b
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 0.9991

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://soxebez.ru/strik?utm_term=is+the+selection+appropriate+for+a+12+year+old PDF link annotation
    • https://cdn.sqhk.co/foxoxaze/jhY4khN/dufojoner.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/amphibian_species_of_the_world.pdfIn PDF document text
    • http://legendbilisim.com/podanineditafpia.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/qjjG7ic/terujojopakivagusosob.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/ho0ibCn/dealer_s_life_pawn_shop_tycoon_mod_apk.pdfIn PDF document text
    • http://trenolgia.buzz/jkbose_10th_date_sheet_kashmir_divisionco0pw.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/fxifhbi/71346696121.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/ser_bachiller_preguntas_y_respuestas.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxawexa/OiU4hfh/ziromorejufo.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/jejejhe/52116643634.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/hhjfieh/laravel_form_submit_using_ajax.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/Nwbgfhc/tournament_edh_deck.pdfIn PDF document text
    • http://tohld.in/97894984113wez10.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/cells_and_organs_of_immune_system_kuby.pdfIn PDF document text
    • http://arfeshome.com/xoxokikoi47le.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/27293913808.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/94921655634.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/lawakux/free_event_proposal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/answer_machine_messages_for_businesses_examples.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/47362661940.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/52302848514.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/98219392480.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/madame_butterfly_opera_song_list.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/aha_2018_guidelines_cholesterol.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/fantasy_football_names_for_2020.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_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 5468 bytes
SHA-256: c3023d744e55e80314fe10d191968e204ed0c6366a13b4ca6a924d59f9ca41fc
font_01_sfnt_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 11308 bytes
SHA-256: bb3a9759b04f7e955a171550c0c70901a6b32f4cb6dfe6e620711a569a12eb09

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