Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8462ff9c2b06d25…

MALICIOUS

PDF

46.4 KB Created: 2021-05-16 19:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 27cbd58f2ebb256082f42f0ff376b0cb SHA-1: 2deb60650d24f28d64a6b184b030e08f156e55dd SHA-256: a8462ff9c2b06d252025418bc725c712ee6d662990d81959518f79f6e8bf4ac6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.8948

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/431946152/you-promised-my-son-free-robux-game-hack PDF link annotation
    • https://tokunfome.com.br/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.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
stream_003_off00004b0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0C 26856 bytes
SHA-256: 4d422993e3374229cfeaf6f4ef3cdaa94a416a8f5fb9c8f1753ffb778121b161
font_01_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9056 19260 bytes
SHA-256: 86e86c6d1a3146e1f407edd8c9cf68c56566e4a3a2a05930f639aef478547eb3

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