Malicious PDF — malware analysis report

Static analysis result for SHA-256 605da30c2407bc86…

MALICIOUS

PDF

36.2 KB Created: 2021-07-01 02:13:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 85c33b12ad2034d84f0255649d05c453 SHA-1: f0023c163f1f90b3bb4faed0dd7e7a9099e84ef6 SHA-256: 605da30c2407bc8608333844b11f3acf559fe95e68e40d282d5d585fb243f19e
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 0.9890

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-coins-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/free-robux-generator-com-roblox-hack_GM431946152.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/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-i-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/easy-robux-hack_GM431946152.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/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-on-roblox-in-3-simple-steps_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-support_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacks-how-to-get-free-galaxy-coins-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/wurst-18_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22940 bytes
SHA-256: 1b4ab6e8c120084c7f115a3decfcbc4bff914de8aa235f30d69520f6f479983d
font_01_sfnt_off000060f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADD 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90

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