Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3cda6b302b0c7b…

MALICIOUS

PDF

83.7 KB Created: 2021-05-12 04:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 97808a8d7626ee6ff28284d5eb83324f SHA-1: 9cfecea2b57e96e28a695f9471928d5b26a10df5 SHA-256: 2c3cda6b302b0c7b4d6d08a159d20f4575875ca1e37d24c70cea49a247d5646c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, appears to be a lure related to car information, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=is+2006+honda+civic+hybrid+a+good+car PDF link annotation
    • https://debamivuk.weebly.com/uploads/1/3/1/8/131871977/bujiwokovatisemut.pdfIn PDF document text
    • http://clobuss.ru/xolexiwawirituwugokagafijf8us.pdfIn PDF document text
    • http://arendagg.xyz/principia_mathematica_bangla4q7ax.pdfIn PDF document text
    • http://prodson.space/thirteen_reasons_why_season_4_episode_3_soundtrack3aete.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/xveicFg/how_to_make_total_in_google_sheets.pdfIn PDF document text
    • https://gufulesem.weebly.com/uploads/1/3/4/6/134698375/3166872.pdfIn PDF document text
    • http://strongcreditscore.info/21681249320739iv.pdfIn PDF document text
    • http://sberpodarok2020.online/functions_of_world_trade_organizationphwol.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/dBCvgyh/top_nine_for_instagram_best_of_2020.pdfIn PDF document text
    • https://rafopotoze.weebly.com/uploads/1/3/4/6/134609035/wuzuzowexeju-pepigosad-kosisatewo.pdfIn PDF document text
    • http://porn77.design/glow_discharge_plasma_nitriding_of_low_alloy_steelfehtf.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/RjfWW4b/68809036051.pdfIn PDF document text
    • https://fikuwigo.weebly.com/uploads/1/3/1/0/131071253/22512f2.pdfIn PDF document text
    • http://profoto22.ru/questions_to_make_you_fall_in_love_new_york_times4ex56.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/vhhjjid/pizup.pdfIn PDF document text
    • http://wersita.space/d3_pie_chart5y38h.pdfIn PDF document text
    • http://kvyovk.xyz/batho_pele_principles_social_developmentgf35s.pdfIn PDF document text
    • http://apsdd54gfv.xyz/quickstudy_laminated_study_guidesxzgs9.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/gcg8ihy/66891883974.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/paxunu/ruxokebepifijuwulazewagi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/dasefilabujo.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_off000106c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C6 5836 bytes
SHA-256: 4ff4ecdfe7352a7e382c63310af224c4457349fc4d015f3523c4fb9be7389ed0
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 11848 bytes
SHA-256: c10a644c79c9a1c28c1ce6f2ae6ee764fb41884725fc260ab8d986fe93e9463d

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