Malicious PDF — malware analysis report

Static analysis result for SHA-256 d751f82da6963fe4…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 04:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d818a36cd9881ff5ec20d6d5cdc0b0a3 SHA-1: c47de154a8f3510e9ddf98e9a300ed86686911e2 SHA-256: d751f82da6963fe48d4dfbf065f50146be73686b0dfba3a646e49edd8011a0c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'game hack' redirector lure, pointing to a URL that promises free items for Roblox. The document body, though heavily obfuscated, contains similar URLs. This suggests a social engineering attack to trick users into visiting malicious sites, likely for scams or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-scripting-language-game-hack PDF link annotation
    • http://webstan.be/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/roblox-scripts-changer-cheat_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/minecraft-free-apk-java-edition_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
font_00_sfnt_off0000515c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515C 25264 bytes
SHA-256: 8a126eb697850f57821751d87879638b71b71da81b246d1e47f9e6709e5bc95b
font_01_sfnt_off00008b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B95 19008 bytes
SHA-256: eaf1d97580ab2d16ab641b6fca6ebbb75f81ed62e1587d23d4bdad70b8502ee5

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