Malicious PDF — malware analysis report

Static analysis result for SHA-256 9474c6ce6df8ab97…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 08:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c0ceb19e4d9272c116e62922f0777c6c SHA-1: 33982cfa11d4da56ec9f0cfa2b4530cfe1be488d SHA-256: 9474c6ce6df8ab97dc4cf5cca92632d4b49b0c22e2c94e2ea9ffad2b2066d474
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a prominent one being `https://midufefew.ru/strik?utm_term=dyson+v7+absolute+user+manual`, suggesting a lure to a malicious site. The PDF's structure and embedded links point towards a link farm designed to redirect users, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=dyson+v7+absolute+user+manual PDF link annotation
    • https://cdn.sqhk.co/laxefotogulo/gcjbIic/map_of_uk_and_northern_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufojigox/yjdfjhU/war_of_conquest_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/zeragekub/h83v7Bv/62191384291.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/jhohdOk/58794723064.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/jajgdOL/best_dirt_rally_game_ps4.pdfIn PDF document text
    • http://dopenukivo.22web.org/56507789163.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugosedik/0nZiaoY/lexispaper_offline_wikipedia_dictionary._com.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/oEjhehd/world_history_definition_of_secular.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jcFjejh/getopekikupomafakux.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/yjhiriv/snowfall_season_4_delayed.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/Vgfhhij/31349902676.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/bizelatitesofox.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/IidhcoK/46006749236.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/hiiaujg/nupapafoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukuzuxowilaz.epizy.com/fokasuj.pdfIn PDF document text
    • http://zogakuxedik.epizy.com/tugebo.pdfIn PDF document text
    • http://sonapap.rf.gd/10669473238.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/taotao_110cc_atv_reviews.pdfIn PDF document text
    • http://vedebimefawimad.rf.gd/empire_halo_too_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/75391292690.pdfIn PDF document text
    • http://bogigipoja.epizy.com/dakuxidazelokozizexam.pdfIn PDF document text
    • http://zerujafulo.rf.gd/ignou_m._com_assignment_answers_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/how_to_search_google_using_an_image_on_mobile.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_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 5212 bytes
SHA-256: ba62e871355dd6e1f60af900c6fb9e18d2b61510b54b6bff53a35a37bffdd836
font_01_sfnt_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 10644 bytes
SHA-256: d7a1a650f06ba1c23ff459eba961cedeff15f645c69d9edfe11eb15ab2f451bf

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