Malicious PDF — malware analysis report

Static analysis result for SHA-256 66865b861bc84873…

MALICIOUS

PDF

77.8 KB Created: 2021-01-27 08:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: be0f59391d57fd77bbc6941047f88ea4 SHA-1: 99ed8023daa99eadb71e0983bcced153af4dc697 SHA-256: 66865b861bc84873a0c8d001b40eb2e6a09a9fe20778c5f7bab774717a2b0982
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm on disposable hosting and uses a clipboard command execution lure. This suggests the document is designed to trick the user into executing commands, likely to download and run a secondary malicious payload. The presence of multiple suspicious URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=mod+load+order+fallout+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fd107993e39a.pdfIn PDF document text
    • http://arbitestpark.xyz/y8_football_league_soccer_mod_apkbyx8p.pdfIn PDF document text
    • http://shoop-fg.ru/leap_day_gamezaia9.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/snapchat_stickers_to_cut_out_cute6w06o.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/aieWijc/38691685440.pdfIn PDF document text
    • http://triple-doska5.club/basketball_goal_installation_costn799l.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/jhheoHQ/zatufinikosifusaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xupixawina/4jcYNhg/mr_love_queen_s_choice_walkthrough_victor.pdfIn PDF document text
    • http://bitjoms.xyz/41244956855tnq5c.pdfIn PDF document text
    • http://izzzaaa.space/duck_hunting_kayak_with_motorayzie.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/ge8IOhe/marketing_assistant_jobs_in_atlanta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fcd75e6ee4f5.pdfIn PDF document text
    • http://cmb-accueil.com/asteroid_approaching_earth_2068rm6l0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ffc2184ab74d.pdfIn PDF document text
    • http://antonioit.fun/city_car_driving_game_car_simulator_games_3d02cif.pdfIn PDF document text
    • http://umkatrade.ru/criterios_de_la_primera_y_segunda_de2w491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5fcb4142df91b.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/rebomedug/kifunalox.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_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 4816 bytes
SHA-256: cbca352bc9d7ceddcc8f8893c1718db81a9d3c30c33b7e9ce7e3e8bea37d834a
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 10856 bytes
SHA-256: 9e20ff07771304d3eaeece0d9726a1e553ce7b55689cdebaf834860f11c67960

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