Malicious PDF — malware analysis report

Static analysis result for SHA-256 166400b0c0462293…

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 16:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bdfaa20bee944477e5f2f684cffac8ec SHA-1: be66a5e3454b459a99b5503fcca1f768270ff3f0 SHA-256: 166400b0c0462293f1c64cdd3c789579c1c275843997aaf60952058a69708dd0
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URLs, such as https://netcdn.xyz/app/431946152/how-to-hack-someone's-account-on-roblox-game-hack, likely lead to a second-stage payload download. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-to-hack-someone
    • http://altc.de/images/free-back-accessories-roblox_GM431946152.pdf
    • http://altc.de/images/codes-how-to-get-free-robux_GM431946152.pdf
    • http://altc.de/images/buy-robux-free_GM431946152.pdf
    • http://altc.de/images/free-spins-coin-master-app_GM406889139.pdf
    • http://altc.de/images/robloxheroxyz-free-robux_GM431946152.pdf
    • http://altc.de/images/coin-master-hack-2021_GM406889139.pdf
    • http://altc.de/images/coin-master-freebies-2021_GM406889139.pdf
    • http://altc.de/images/free-minecraft-alt-accounts_GM479516143.pdf
    • http://altc.de/images/get-free-robux-today_GM431946152.pdf
    • http://altc.de/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://altc.de/images/how-to-get-free-robux-codes_GM431946152.pdf
    • http://altc.de/images/roblox-redeem-codes-free_GM431946152.pdf
    • http://altc.de/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • http://altc.de/images/can-you-hack-coin-master_GM406889139.pdf
    • http://altc.de/images/coin-master-hack-online-pc_GM406889139.pdf
    • http://altc.de/images/moon-active_GM406889139.pdf
    • http://altc.de/images/free-spin-coin-master-app-download_GM406889139.pdf
    • http://altc.de/images/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://altc.de/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://altc.de/images/free-robux-cards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f5.bin
51b83208ff2c8378cda53ff1756800513a922891be1985fec0fe2f3ffdcbe6c5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F5 23760 bytes
font_01_sfnt_off00007e1c.bin
995056b981027bfba3f97be2499ebace8b386febdb07856c531761fbe005e83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 18912 bytes

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