Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61f02ed07d96fb9…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 08:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc5ba0418607de50d569842db423efac SHA-1: ab3221346d139b4d23d4da39006898683952b817 SHA-256: a61f02ed07d96fb9af86daaa725b29651731714bfd734c0af27cc409f8d02579
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/406889139/como-hackear-coin-master-en-espaol-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-wizard-life-hack-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-i-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-script-roblox-game-servers_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-jailbreak-2021-mega_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-full-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-a-free-unicorn-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbx-free_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
stream_002_off00003145.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3145 23864 bytes
SHA-256: 1a9c11f9b00deb5b0afa6eb65d76c7e05f3aae9fb755a9db7afeb6ac79ed9a3a
font_01_sfnt_off0000675e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 18516 bytes
SHA-256: 2733bbd7379f0315f5029cf6e8e3afc196c30f36adae5721920a74f68d8b4415

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