Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f331d5d2265465…

MALICIOUS

PDF

33.3 KB Created: 2021-07-07 19:40:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0fe0b11ea130c609016e88d463cfb7da SHA-1: af78f35a0f181a6f4c3c96c93a6a2f2d94a8f917 SHA-256: a6f331d5d2265465e8cb9bda8334cb69dc28e523c2be04cf7b72e08b295e3352
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' and an embedded URI pointing to a URL that promises free game hacks. This indicates a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/minecraft-java-free-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/console-free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-2021-working_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/como-tener-wall-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robloxheroxyz-free-robux_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_off00002f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3E 22052 bytes
SHA-256: 65b27fa45d25617e64b8c881ed0d112abe1750b65940c02d1cb6a122329993bf
font_01_sfnt_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 18136 bytes
SHA-256: 6eb1f737dc26468ab321cead5519c6da0f94fa913db2fdf5dfa3628eb349cd49

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