Malicious PDF — malware analysis report

Static analysis result for SHA-256 15511088e15fd959…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 19:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2f9db8486609a8c533975741d9f98b8c SHA-1: 0863d366c3c83586a344d9d4a47dcf4f01d415e3 SHA-256: 15511088e15fd9595effefbdfa04bdf40587645e959503e1fb176932547bcc31
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 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-without-human-verification-india-game-hack PDF link annotation
    • http://www.vktzunami.cz/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-bedrock-for-free_GM479516143.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
stream_003_off00004a46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A46 24828 bytes
SHA-256: 9a5cd9f0b92c4bcd9f3de7e3aed735d3b6313a4cf86c7efcdf88133572663007
font_01_sfnt_off0000828e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 18788 bytes
SHA-256: f03f84e40d510781fd9acf302c96448e3582cb87a5c2d27401c18c9e1d195815

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