Malicious PDF — malware analysis report

Static analysis result for SHA-256 39afaef759ee861e…

MALICIOUS

PDF

34.1 KB Created: 2021-06-22 06:52:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bd770d800ba9fee0a139122aebcd4baf SHA-1: ff18dd9046a51c2902f9d7c194a890a37b62d6d3 SHA-256: 39afaef759ee861e8b104912a52557c4e1dec6e1b0d4ef8eb5e13e806265e606
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/how-to-hack-coin-master-without-root-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/www-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-jan-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-aimbot-free-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-deutsch-download-ios-link_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-free-stuff_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/como-hackear-coin-master-iphone_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_off00002e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E69 22728 bytes
SHA-256: 18a08f80f1a78758e03a7c147195ca6847d83d80546628128b20a56990fd8531
font_01_sfnt_off00006135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 18672 bytes
SHA-256: 65f2c136a711b33bae163ea9f406f42914fe63f4814e0759507e5b4be6ac5284

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