Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc514b18d4d21b37…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 23:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99deb7f1129e91634c3c5c7a9d629284 SHA-1: b65f85fd8e51b1fffb1ccf7b40d455b65810412f SHA-256: dc514b18d4d21b375ee87749b2ed165cbea09abaf31abc26d28c29d3c4a61077
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.tw/app/431946152/free-robux-place-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/free-muscle-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-r-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-accounts-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tiktok-for-free-install_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/best-script-for-slx-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/codes-to-get-free-crowns-from-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-filtering-enabled-weapon-scripts-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/reeze-tag-original-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-how-to-get-free-gear_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-999m-robux-no-survey-no-human-verification-2021_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_off00002f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F24 21936 bytes
SHA-256: 1f25d6e2d4813f86b4ee59ae8936a27bde19c6adf267c0318034e24a472e4a74
font_01_sfnt_off00005f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 18944 bytes
SHA-256: b09bc8733bdd60a9e3d807131716c526420abed0d95e213ec937364ccfb38658

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