Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6467d40338d018b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-06 12:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 342d6de60b88f6d123a15070f111262b SHA-1: e5dc4169e30cfb0c9aee38dd3c0a5a74d319e553 SHA-256: b6467d40338d018bccceb8d3b457f4a151dbdf9bcb97be8fa8b6cde5a2172b53
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_MFA_LURE' suggests the document is designed to harvest credentials or abuse multi-factor authentication by prompting the user for a one-time code or confirmation. The embedded URL 'https://midufefew.ru/123?utm_term=vista+20p+master+code+reset' likely serves as the destination for this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://midufefew.ru/123?utm_term=vista+20p+master+code+reset PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494165/normal_5feb34cfcc5a3.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/hehcEif/scalextric_slot_cars_ebay_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5ff2869ea0783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_602bb4a12242f.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/jhdI3Pq/top_10_caller_tune_2020_tamil.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/fugazufodeka.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/iihbxsN/28371411161.pdfIn PDF document text
    • http://kugetogegus.iblogger.org/bamuwefejegasewise.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/ggjajcw/descargar_minecraft_new_nintendo_3ds_edition_cia.pdfIn PDF document text
    • http://watogoda.mypressonline.com/percy_jackson_and_the_lightning_thief_summary_chapter_15.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/demian_book_pages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_60433d5e4bab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6022051a1e528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/how_long_does_it_take_to_learn_matlab.pdfIn PDF document text
    • http://fisafowuvugedug.rf.gd/65565400551.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/27064074175.pdfIn PDF document text
    • http://bipitor.epizy.com/jilomimawerezofonipu.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/49576210857.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/the_tragedy_of_macbeth_act_2_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/abstract_algebra_john_fraleigh.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/sbi_anywhere_app_for_windows.pdfIn PDF document text
    • http://wasuwenakab.epizy.com/journal_of_materials_chemistry_a_template.pdfIn PDF document text
    • http://dalotidel.epizy.com/lelelufabijomawivavatukes.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_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 5424 bytes
SHA-256: e8463e2486559036a609bde9cd855f5b795186226015113412d4a489966ff265
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 10136 bytes
SHA-256: 4a94d00c9081ba2338a33486ba1ed89ed171d67601fe130883654d1abc2c61b6

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