Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0fab2a01b54667…

MALICIOUS

PDF

47.7 KB Created: 2021-06-07 14:38:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e5a640ead110b2526da440452bf2204 SHA-1: c42873a1676d98a03f0141621626386afbed5055 SHA-256: ba0fab2a01b54667b5bdfe02f262822bde7a74f4d0abb0c62c61bee0dee2cfe7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically mentioning 'hack-adminisrtateur-thr-roblox-2021-game-hack'. The embedded URL, https://netcdn.tw/app/431946152/hack-adminisrtateur-thr-roblox-2021-game-hack, is the primary IOC. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a lure to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/hack-adminisrtateur-thr-roblox-2021-game-hack PDF link annotation
    • http://www.drent.se/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.drent.se/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517F 24868 bytes
SHA-256: 738ff733d8feae183b03bbda5a082f910089bf4a7599f5e1c02a9fb2d1930e34
font_01_sfnt_off000089e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E2 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 19548 bytes
SHA-256: 4bd431b92a84a424619bbb75b7c71b05142aeab21d977b20afbd051f671b1898

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