Malicious PDF — malware analysis report

Static analysis result for SHA-256 79497a88a9a2d3ab…

MALICIOUS

PDF

71.0 KB Created: 2021-02-12 03:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 773e20ba1dfe3d6408e90cc7356c86e9 SHA-1: 9db9a93b8969a5d755b5ccbf2892d078855a90fc SHA-256: 79497a88a9a2d3ab807abf3063873f93078ff56adf8ee66dc5a58048616d9bc7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=signals+and+systems+schaum+series+solution+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/jebixusugak/HbifhgK/mini_battleship_keychain.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/jg6hegc/astrobrights_wide_ruled_color_filler_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/gighhgj/manicure_at_home_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ighe9gd/fudox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fe8f8d193470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5ff767d3a7b2b.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/6ghwCif/dofoboga.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/aiaAXwN/sniper_ghost_warrior_3_weapons_unlock.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/rmhfkig/download_diablo_immortal_apk_data.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5ffc93d5e79ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_600adea5be2bf.pdfIn PDF document text
    • http://xutuvulamarav.iblogger.org/clostridium_botulinum_bacteria_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5fdc39cb2b4cf.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/jikGgee/cake_decorating_supplies_michaels.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/tezofuretejom/apple_numbers_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/bottled_water_consumption_in_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/kirobanaxufewexetu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/bts_love_yourself_answer_mv_teaser.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/acquisition_strategy_template_dau.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_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 5776 bytes
SHA-256: 8b7ee3ddd4c54820b8c87605170b9d859354cfe5d0c894ac7a28525a2fb07bcf
font_01_sfnt_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 9856 bytes
SHA-256: 209db6a9a00da2b0c92613298d567edb17757cc01069cb8c5dd7f8874a64072f

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