Malicious PDF — malware analysis report

Static analysis result for SHA-256 9999c06eca3c9e7f…

MALICIOUS

PDF

48.3 KB Created: 2021-06-07 23:51:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28297a34e631c0b240f9740d91dad510 SHA-1: d708ba2072fb57ea4d3d32c70edd37ad97724b00 SHA-256: 9999c06eca3c9e7f0a6283da42a8fc2be4d71b670e23e807a5c3e006a707ab3f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also contains an embedded URI pointing to a suspicious URL, likely intended to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-roblox-knight-skin-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://reggieslockandkey.com/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-with-guddinfo_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-the-coin-master_GM406889139.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_004_off00004e81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E81 26564 bytes
SHA-256: afe890a48ef6a7111773ef51714cc2a962014487a381d19997a8bd83bff6cb2f
font_01_sfnt_off00008b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 4060 bytes
SHA-256: deea5af2c09f62a23e371236e39c37cd42365b33429c1415deb93206ff7ea9b4
font_02_sfnt_off000098a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 18796 bytes
SHA-256: 2d47689588bd6bd1937dd182ec99cab63500dfab07b01f177c21e2ddeb84c6a2

Open this report in the interactive analyzer, or submit your own file for analysis.