Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c364db0a0216fc…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 08:42:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 66febe02cad57fbe59ed8e723b5c0b44 SHA-1: ab65e93f57df88dc758601219798693294769985 SHA-256: d8c364db0a0216fc9d3bc83277153b242014b95e826c9a87cf7c8a35a8367d34
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.tw/app/431946152/how-to-get-free-robux-no-verification-game-hack PDF link annotation
    • http://sd-olimp.hr/files/free-roblox-executer-purple-bunny_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-any-tycoon-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-make-a-free-admin-game-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-robux-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://sd-olimp.hr/files/brick-cars-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/focus-points-hack-roblox-dybo_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-unbanned-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-generator-for-kids_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_off0000342e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342E 22800 bytes
SHA-256: 1910033b0703c2160dd680e875f19bf37334bbb9b7b257a9a1d9c5c9f31cac99
font_01_sfnt_off000066ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 19240 bytes
SHA-256: 7000039a4416ac0135e90d34ca5c89af1b7d80dfbac1969cb80e33a7c999222c

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