Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5f18c4fd40bef0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 08:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1f17f01a1999fd7120caa7a132ac287f SHA-1: b9362ab36b439cedfd7a97a7fda9a77cc2457cbb SHA-256: 9d5f18c4fd40bef099837acef381da7dedbdd5d6114083b84d4854b5ba045cb7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common social engineering tactic, luring users with promises of 'free Robux' and game hacks. The primary malicious link, http://netcdn.tw/app/431946152/free-robux-real-2021-game-hack, is designed to redirect users to a potentially harmful website. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game-related cheats to drive traffic to malicious sites, likely for further malware delivery or credential harvesting.

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-real-2021-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-prison-life-how-to-kill-all-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/descargar-roblox-walk-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-does-roblox-know-if-you-are-hacking_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-roblox-hack-pc-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-maze-runner-cheats_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/future-free-items-on-roblox-leaked_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coolkid-hack-client-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-no-points_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-u-hack-roblox_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_off00003108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3108 22464 bytes
SHA-256: 1d81efae162fdc9045b03daed4878d39e7a4b30b8b11fd346af3d399b4119f12
font_01_sfnt_off0000633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633F 19192 bytes
SHA-256: 0a56f38ee828cc338b4ecf6fd69a1c4ab782641ccce74c835442ee7dbad06135

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