Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9c19bb0dd573d8…

MALICIOUS

PDF

45.8 KB Created: 2021-05-15 12:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 46a56a6fe9bc0fbeb17e1c6fcb07e818 SHA-1: 86297d7e8fbd854e92a14802241c75fe487178a0 SHA-256: cf9c19bb0dd573d85c6e5acbdbf426ed0804c34883bf2b183f25a9db99cf40db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document displays a fake CAPTCHA, a common social engineering tactic to trick users into clicking malicious links. The embedded URLs, such as the one pointing to 'how-to-hack-coin-master-game-2021-game-hack', suggest a lure for game-related cheats or scams. The document likely serves as a lure to download a secondary payload or redirect users to a fraudulent website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/how-to-hack-coin-master-game-2021-game-hack
    • https://domc.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://domc.tw/upload/files/free-promo-codes-for-coin-master_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-tiradas-gratis_GM406889139.pdf
    • https://domc.tw/upload/files/win-free-robux_GM431946152.pdf
    • https://domc.tw/upload/files/free-minecraft-bedrock_GM479516143.pdf
    • https://domc.tw/upload/files/minecraft-education-edition-free_GM479516143.pdf
    • https://domc.tw/upload/files/earn-robux-sites_GM431946152.pdf
    • https://domc.tw/upload/files/coin-master-hack-spin-generator_GM406889139.pdf
    • https://domc.tw/upload/files/stock-speed-coin-master-free-spins_GM406889139.pdf
    • https://domc.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://domc.tw/upload/files/robux-com-free_GM431946152.pdf
    • https://domc.tw/upload/files/coin-master-daily-free-link_GM406889139.pdf
    • https://domc.tw/upload/files/get-coin-master-cards-free_GM406889139.pdf
    • https://domc.tw/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://domc.tw/upload/files/free-robux-rewards_GM431946152.pdf
    • https://domc.tw/upload/files/free-redeem-code-for-coin-master_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-hack-app-2021-download_GM406889139.pdf
    • https://domc.tw/upload/files/get-free-coins-for-coin-master_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-500-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e5.bin
15baac2c9dd73edae56a6c85ac899172e94975c1f794f7a5af6c83b4c174d6fb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E5 26808 bytes
font_01_sfnt_off000085db.bin
fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DB 2812 bytes
font_02_sfnt_off00008f7b.bin
0dd6564037b1693bc387ec554476f6901470b6523a56a44e31cb3c159dc675b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 18540 bytes

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