Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8148c31fa00ac8…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 10:37:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d444de72ecd6d539d8a805182bf18b21 SHA-1: 4ddd83168073a0b2f24a513fc964ba5089aae375 SHA-256: 9f8148c31fa00ac8e6f4195301c0ea89e2a0ac2fb70e313b3f3eed3c973fe3a4
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/479516143/minecraft-cheat-client-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-2021-september_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robuxkingz-ml-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacks-master-coin_GM406889139.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-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-hand_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/redeem-robux-for-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/abs-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/cheat-tembus-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-com-free-robux_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
font_00_sfnt_off00003274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3274 22392 bytes
SHA-256: 59250e5a72210b7622ca4c55d5b4cfcf5cec92213927336e0b97534bbc15d392
font_01_sfnt_off000063ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 18096 bytes
SHA-256: a995cd656f0262510fbde6104514bc63f73b186495f82817e83ff315ecbe0e31

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