Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ffeec38bc00d53…

MALICIOUS

PDF

74.1 KB Created: 2021-03-25 12:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc2d7b01fe940f9f26b67fa029be62df SHA-1: 761f94324d6b93897d629ce3f7d0e1d0b947e601 SHA-256: 85ffeec38bc00d53f4981a9168b7be14bb063d2aed199722000bc771a7f4f833
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of embedded external links, indicating a potential link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/aws?utm_term=common+core+standards+kindergarten+speaking+and+listening
    • https://cdn.sqhk.co/feluxolid/w7IgeyZ/stair_runners_carpet_uk.pdf
    • https://cdn.sqhk.co/fokofike/Jrhjiat/lowixipufemagazadapur.pdf
    • https://cdn.sqhk.co/xotosira/GpgjPXd/55066182524.pdf
    • https://cdn-cms.f-static.net/uploads/4500447/normal_603e872622b5e.pdf
    • https://cdn-cms.f-static.net/uploads/4451955/normal_604422d2040f2.pdf
    • https://cdn.sqhk.co/lomasamube/egj9iiD/decimals_to_percents_worksheet.pdf
    • https://cdn.sqhk.co/kewudomavave/jb2ShhL/elements_of_design_space_photography.pdf
    • http://lutawud.22web.org/pillars_of_eternity_character_creation_guide_for_beginners.pdf
    • https://cdn.sqhk.co/genopeno/hiCwihh/super_suite_inn_san_antonio.pdf
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcce3021df16.pdf
    • https://cdn.sqhk.co/figegixo/jbyhbHg/10113495033.pdf
    • http://kejamezegujoz.iblogger.org/performance_boat_listings.pdf
    • https://cdn.sqhk.co/binuwaxe/iikDij9/withstandz_zombie_survival_hack.pdf
    • https://cdn.sqhk.co/kupawusel/fggjhgc/dice_bag_games_online.pdf
    • https://cdn-cms.f-static.net/uploads/4459466/normal_60377f0c8619f.pdf
    • https://cdn.sqhk.co/nurijodefa/Tfibaic/18075217312.pdf
    • https://cdn-cms.f-static.net/uploads/4480594/normal_602f8ab3d2db8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_0a6f92d5b80147e6bb834d5a14a762ec.pdf?index=true
    • https://s3.amazonaws.com/xamibebulosaxug/bass_tab_sheets_blank.pdf
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_c06f0c2100ea44608d933533be65e04a.pdf?index=true
    • http://zanulewetadom.epizy.com/43651484910.pdf
    • https://s3.amazonaws.com/wukara/52540613672.pdf
    • https://s3.amazonaws.com/zeworibuzoza/rilomuvekufikenogolaf.pdf
    • https://s3.amazonaws.com/jobavo/dragon_nest_lunar_knight_guide.pdf
    • http://mugekalamiwatek.epizy.com/diffrence_entre_c_est_et_il_est.pdf
    • http://nexuxawire.epizy.com/which_of_the_five_marketing_management_concepts_best_applies_to_jetblue.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin
efecc935253fd457187c0fd187ca5780d75a38dd06e7e7c8d540f5da99a2a9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5360 bytes
font_01_sfnt_off0000f902.bin
aa4008152c1a79b931304f8cabf7ac1d802711e104026cc34101205dcd61de82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 9800 bytes

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