Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1dd30a9cda1926…

MALICIOUS

PDF

33.9 KB Created: 2021-06-22 10:29:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4957ba196cd09b373b3f6921aa66011 SHA-1: 51607463ca2fb171599d2b88fb8022a3345b40a4 SHA-256: 0a1dd30a9cda19268af5f5bb2365c150cfe2d292cf3270aa8d7d55afc9d7c1f4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise free in-game currency or hacks for popular games. The heuristic firings indicate that these links are intended as a lure to redirect users to potentially malicious content. The ML classifier strongly suggests malicious intent, and the presence of numerous game-related lures points to a common social engineering tactic.

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/can-you-give-limited-for-free-in-roblox-game-hack PDF link annotation
    • http://hardbit.cn/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/get-free-dominus-hat-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/get-free-robux-without-downloading-games_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/best-free-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-printable-roblox-images_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_off00002d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8D 21792 bytes
SHA-256: 1556323b6e2574f1e534d9dd484bb108687fbc243fc8e4c2d0ba349e75ebac3a
font_01_sfnt_off00005d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 19724 bytes
SHA-256: 271b408800d6c63327e02951098612348fa6d77dd76512b52e1f3422fad7067b

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