Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adc416c703060c2…

MALICIOUS

PDF

32.7 KB Created: 2021-07-05 03:22:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ac009e697a9ab9ff09ebfa9735498d25 SHA-1: 061b6a86315eda38414ad933d4cda876d681e1c3 SHA-256: 4adc416c703060c23bdc9b60755f4a77f623ab71b7e53d97384f688da5acb027
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to free game currency ('Robux', 'Coin Master') to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/sites-to-get-free-robux-game-hack, is identified as a redirector for game hacks. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest a malicious intent to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/sites-to-get-free-robux-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-old-roblox-account-new-may-2021-ebay_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-without-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-pc_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-be-a-vip-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-survey-at-all_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/pinknoxious-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-arcane-adventures-stats-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/ben-ten-roblox-game-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-summer-event-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-downloading-apps_GM406889139.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_off00002b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B68 21784 bytes
SHA-256: ecbcc917b2c7e247f8af067843a10d4aa2ae07a0a3488dbf15c7a03b6d7626d7
font_01_sfnt_off00005b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5A 18940 bytes
SHA-256: 12a760e2c1ec97f90af30afb205c0b6409d60b5d12cf2c59927e5ecc658ee3cf

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