Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60789e8e5667818…

MALICIOUS

PDF

34.7 KB Created: 2021-06-22 05:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3d7bf722d86976b368b0b523ce6324b6 SHA-1: 2a3a79f9ce5306ccd208b3bf9fbb61880cf45a3f SHA-256: a60789e8e5667818b99c5d411113988b23f6aae8a848a366a969cd52969eb154
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-spins-deutsch-download-ios-link-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-piano-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/2021-robux-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pubg-uc-generator-2021_GM1330123889.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-codes-that-r-rel_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacking-engine-for-roblox-easy_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-clients-jailbreak_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.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_off000031f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F3 21912 bytes
SHA-256: 0db0051d6a8bdc3d54104b5a2bed3d69e65c77055aed375124196eaaa1d8fa02
font_01_sfnt_off0000623f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 19228 bytes
SHA-256: 634a6888a1904234b303079f3dc1bf5a4e5ffef1388b284b3e88d08e2c9e8665

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