Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e70c0df3c84fbd…

MALICIOUS

PDF

34.3 KB Created: 2021-06-22 13:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4baf87508a2cd78e7daf9613fc8fd222 SHA-1: b0f89342e0d5d546f4ad014352b4def2aeb94b7a SHA-256: a7e70c0df3c84fbdb3307f9bd8cac9441beaee7f10503b75a788889a0d5d41ef
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/431946152/free-robux-generator-com-roblox-hack-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-island-royale-cheats-for-bucks_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-can-i-get-free-robux_GM431946152.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/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-offers-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacks-for-build-a-boat-for-treasure-roblox-infinite-blocks_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/daily-free-spin-coin-master-link_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_off00003120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3120 21444 bytes
SHA-256: 531132ac54a33b696abe69b7ec6428339f4c63de40377490fbec9b12826929dd
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 19324 bytes
SHA-256: b5fe64a349a1260a8bf1e39cb434a35d84e03f20b24c2703f62dd6d7df3547b9

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