Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2921be8b10ab6bb…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 09:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c2e6077df4751faf8865c8b44e6b647 SHA-1: cb3866a2e2707b0a599e03a7f26fd1315d50bb29 SHA-256: c2921be8b10ab6bb2835e7c65efce6e3db539fa45069227833c2a96c2aa8b8f8
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 0.9864

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 https://netcdn.online/app/431946152/roblox-games-free-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-skins-in-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
stream_004_off000050bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BB 27456 bytes
SHA-256: 39c7a44581cc71255897a27b7f0f0a54b26d070798e1ab7738165c0a5fb7f7d7
font_01_sfnt_off00008fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAE 18436 bytes
SHA-256: c854a6c24cd9397543535c319deb2c67afb6e9d7a93f095be0a0206a19e96549

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