Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a29d698e62fb29…

MALICIOUS

PDF

90.2 KB Created: 2021-03-30 11:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414edc2893201a677e51c6a24bc75092 SHA-1: 51b154a591574562035a7bf113633a64c3147128 SHA-256: a9a29d698e62fb299371bcf8c6a52f0570d0c8fe18ce6b3e2031216661278b56
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, indicating a potential link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=what+is+a+civil+processor
    • https://cdn.sqhk.co/terasovo/hbLCrgd/piwilezex.pdf
    • https://cdn.sqhk.co/relulapezele/hgiiZhh/buxivefiw.pdf
    • http://kekasot.22web.org/telenovela_acapulco_bay_english_version.pdf
    • https://cdn.sqhk.co/lazujanaziri/geZhcHV/magic_piano_pink_tiles_music_game.pdf
    • http://ekzo-fruit.ru/download_movie_sub_indor3mk5.pdf
    • http://temppicture.xyz/how_to_return_mail_to_sender_if_wrong_address9f1yi.pdf
    • http://medefoduma.iblogger.org/13114411390.pdf
    • http://duxinivodozular.mywebcommunity.org/autism_diagnostic_interview_revised_adi_r.pdf
    • http://tells.fun/how_much_do_2nd_grade_teachers_makee828j.pdf
    • http://jarizodej.22web.org/science_8_diffusion_and_osmosis_worksheet.pdf
    • https://cdn.sqhk.co/dixejetafap/jgdjggf/strike_team_online_mod_apk_unlimited_money.pdf
    • https://cdn.sqhk.co/kixagixupo/drXjdhc/transport_tycoon_wiki_trains.pdf
    • http://1-bog.ru/degaletulesugpxdib.pdf
    • http://gavojutopubiri.getenjoyment.net/business_intelligence_software_at_sysco.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_21906750063f4097a4d15e5d154aca7e.pdf?index=true
    • http://dumiramuji.rf.gd/kupirimovekamefut.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_4fc5440c43094257a34324a94b4a40e0.pdf?index=true
    • http://zonadomafi.rf.gd/78630383671.pdf
    • http://gezixus.myartsonline.com/komuxelowiwuburumijujini.pdf
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_75ba7ffe8f27496bb858aa2bc61e95b9.pdf?index=true
    • http://sadazumi.epizy.com/brother_dsmobile_920dw_wifi_setup.pdf
    • http://tefotifomasun.epizy.com/reaction_paper_samples.pdf
    • http://gikunipif.epizy.com/zotisajer.pdf
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_e00a6826569348b1937e8f5840d692cd.pdf?index=true
    • 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_off000123eb.bin
079abb8816e50c75eee86402754349613a0305fe3f8728159535c4fa4cbe962b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 5096 bytes
font_01_sfnt_off0001354b.bin
96507ebd3a5c4f9f4d8ae8892256abf018808d409b9cc9118872014483078ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1354B 11132 bytes

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