Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b6024151eb343e…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 02:38:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9c62f5b4d1a521a2d702a2a993f56c83 SHA-1: a2cd7b66c916adbcb05a2333f2520c8a43a00a45 SHA-256: 22b6024151eb343e0e3cb7c0482b6dc01b6d0cb5aa978f55cbd6eabb28877a99
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into executing a malicious action, likely downloading a payload. Multiple external URLs are embedded within the document, suggesting a download or redirection attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/hack-para-roblox-facil-youtube-game-hack
    • http://dana1157.com/images/you-promised-my-son-free-robux_GM431946152.pdf
    • http://dana1157.com/images/free-robux-download_GM431946152.pdf
    • http://dana1157.com/images/daily-free-spin-and-coin_GM406889139.pdf
    • http://dana1157.com/images/games-that-give-free-robux_GM431946152.pdf
    • http://dana1157.com/images/free-spin-and-daily-news-coin-master_GM406889139.pdf
    • http://dana1157.com/images/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://dana1157.com/images/free-likes-for-tiktok_GM835599320.pdf
    • http://dana1157.com/images/hack-robux-gratis-2021_GM431946152.pdf
    • http://dana1157.com/images/free-robux-script_GM431946152.pdf
    • http://dana1157.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://dana1157.com/images/bloxpage-free-robux_GM431946152.pdf
    • http://dana1157.com/images/free-roblox-clothes-2021_GM431946152.pdf
    • http://dana1157.com/images/minecraft-pe-hack-client_GM479516143.pdf
    • http://dana1157.com/images/get-free-cards-for-coin-master_GM406889139.pdf
    • http://dana1157.com/images/smurf-backpack-gives-free-robux-generator_GM431946152.pdf
    • http://dana1157.com/images/free-likes-on-tiktok_GM835599320.pdf
    • http://dana1157.com/images/without-tiktok-free-fire_GM835599320.pdf
    • http://dana1157.com/images/roblox-hackprogamers-com_GM431946152.pdf
    • http://dana1157.com/images/tiktok-free-mode_GM835599320.pdf
    • http://dana1157.com/images/hack-coin-master-nyc_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005097.bin
057cb6cd61c1480d24efdfe656725acaf1d3a2eadc8ede76eb6dcac2cc4d294a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5097 25040 bytes
font_01_sfnt_off00008997.bin
1f750dbaed13619c50de13ac87e75d6df7145c0873a3e7acab6e9e751edea793		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 19028 bytes

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