Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa19a4e0a43c0e6f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 01:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 23f9720b477d4b4c126fde5e7d560a5d SHA-1: c869b66bc901becf792ed48c38472e076640069e SHA-256: aa19a4e0a43c0e6f0ac36c136b493637aa28e15fb3826f667e48f8ab5534bfd2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which are presented as download opportunities for game-related cheats and currency. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to trick users into downloading malware or visiting phishing sites. The presence of a download button lure further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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
  • 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 http://netcdn.co/app/431946152/free-badges-roblox-game-hack
    • http://daskrimti-jabar.web.id/library/repository/rolox-promocodes-for-robux-no-hack-no-waiting_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-robux-2021-no-verification_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-one-piece-millenium-stats-hack-script_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/robux-gratis-sin-hacks_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-no-survey_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-minecraft-skins-pc_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library//repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/free-coins-on-coin-master_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-rare-cards-hack_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-robux-codes-2021_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library//repository/minecraft-hack-2021_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library/repository/free-realistic-minecraft-texture-packs_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-spins-coin-master-legit_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-online-generator_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/20210-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030da.bin
01487fbdb5248ffc35350cb7d576acc90ec034230eb2ac52531543b02829ceb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 21972 bytes
font_01_sfnt_off000061d8.bin
b0b54a230d7e36209b0a36861a575ed1b55f57c0ecc9c78dec727c14a774b31e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 18824 bytes

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