Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3353b9d2baacab5…

MALICIOUS

PDF

35.7 KB Created: 2021-06-19 09:28:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4176a85cdda553715c208edb33df5356 SHA-1: 6f1557908e647b7c8c074849a1132a322a6ce069 SHA-256: a3353b9d2baacab5e48af312a39bb778c70a463057915f822b93f39f24450ca8
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/roblox-lumber-tycoon-2-hack-pastebin-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/op-hacks-roblox_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/is-minecraft-free_GM479516143.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/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-para-poder-hackear-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-tradelands-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-donloaden-free_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_off0000331b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331B 22280 bytes
SHA-256: 2a56068eb5c06f0639b36fdee0a5163cde6f58928fecd8b672d135d8d67512c2
font_01_sfnt_off000064aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 19736 bytes
SHA-256: 957271fe662a81870f94822aadf224f805ff889fb1a7104c75fda6aa28a56f52

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