Malicious PDF — malware analysis report

Static analysis result for SHA-256 5baaeb43067c8570…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 10:59:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6c45feb05d1f826c96204d3c5c100db0 SHA-1: 3d96404a6e058d3c03a33b3fdf14f3809e3fef8d SHA-256: 5baaeb43067c85701e09b96b9cf3f2370bf08d63dceced825d9cfb1b83c93665
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.co/app/406889139/coin-master-free-coins-and-spins-hack-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/free-robux-mobile-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-750-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/play-jailbreak-for-free-without-installing-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-gift-card-code-generator-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/any-free-roblox-exploits-2021-reddit_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-easy-on-tablet_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-free-spins-link-today_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
stream_002_off00002f95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F95 22440 bytes
SHA-256: cac0fa1df89cb2cdf44d0070b60cd396bfe1d82948c04331497c6296563987d0
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 18520 bytes
SHA-256: 29c1b28c0a710d6b876e8a0d8218f7449662a67bbf5932a86ad74a08bedf9ae4

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