Malicious PDF — malware analysis report

Static analysis result for SHA-256 823b06cd6d3e4dea…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 02:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56ef2e1d0d035dcc28f84882254373d6 SHA-1: d6bcf78244ba0b669d55962487f84b6d44488bf3 SHA-256: 823b06cd6d3e4deaf246912491cf3a0e3287403e173fae09b4c097644ced3bd4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/how-to-get-robux-no-hack-or-anything-free-209-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-not-a-scam-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/acop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-how-to-make-custom-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3002 22216 bytes
SHA-256: ec44ee7a0b073206c66644df7bc644dfa0fb109d5a598b35e48dbf9b7745253f
font_01_sfnt_off000061a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A8 20080 bytes
SHA-256: 3e1cee14f960ab9c24420e42ed3c5949286831de54291923ec76910ce5a77d0a

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