Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c9f4558caccf29…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 12:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94619bfc0a7f387955af85f3231edc74 SHA-1: 8c36f59d05e6ce0d1a22fab214ddbc6acf3fdae0 SHA-256: b8c9f4558caccf295a1bfdd688b48e6f348cd851e240f311777bc1d7b110b3b0
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 0.9997

Heuristics 4

  • 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://vilenefex.ru/award?keyword=board+game+design+theory+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421366/normal_6009a2b8d2a7d.pdfIn PDF document text
    • http://helpcreditscore.info/124009224595866p.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/bsyfjgr/hearts_of_palm_pasta_trader_joe_s_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/wevemugas/gf7jcgi/free_download_wallpaper_for_iphone_7_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_606a31487863b.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/hi2xVYK/support_synonym_thesaurus.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/hPJEjiN/bhojpuri_video_gana_film_ka.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/gfhhi3c/zombie_slicer_card_coin_master.pdfIn PDF document text
    • http://agentsecure.space/85712884288v8gxg.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/X5ijnEs/57703970639.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/h3pieKc/lixag.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/hgeyrsg/jimagamobubowugabezatimem.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/e8Eghjj/dirt_drift_zones_horizon_4.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/heheIig/91736013461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_6029feb41e45c.pdfIn PDF document text
    • http://keysecret.ru/6288030523pmu0r.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/fajetufekejo/flush_door_design_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/sekuguxusotumexevon.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/domajaditakuvavabuli.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/34896718677.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/world_chess_championship_games.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_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 5576 bytes
SHA-256: 55f4c06cda2c4b50f88430bfc765275631e4c13a76cf2f63f3921034e050745d
font_01_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 11308 bytes
SHA-256: f88df652ea649627999ed2c5ca7bc1491afd2188af8edd66214c212b041118d7

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