Malicious PDF — malware analysis report

Static analysis result for SHA-256 776d40fc3cd4c155…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 05:33:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d7dbbdc1d54ec65c931fd9a7c2fd0fe3 SHA-1: f991c4c6dfd8442972487cf31e7d0c3f5e74d48f SHA-256: 776d40fc3cd4c1556234253528669a347cd36a2114ceb96723e5bf0b46850a3b
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 users into interacting with the document. It also embeds external URLs, one of which is associated with a 'horizon-money-hack' and points to a suspicious domain. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/horizon-money-hack-may-2021-roblox-game-hack
    • http://www.drent.se/images/coin-master-70-spin-link-2021_GM406889139.pdf
    • http://www.drent.se/images/bit-ly-coin-master-hack_GM406889139.pdf
    • http://www.drent.se/images/free-robux-scam_GM431946152.pdf
    • http://www.drent.se/images/free-minecraft-hacks_GM479516143.pdf
    • http://www.drent.se/images/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://www.drent.se/images/games-that-give-you-free-robux_GM431946152.pdf
    • http://www.drent.se/images/hacks-admin-roblox_GM431946152.pdf
    • http://www.drent.se/images/roblox-no-download-hack_GM431946152.pdf
    • http://www.drent.se/images/rbx-free-robux_GM431946152.pdf
    • http://www.drent.se/images/free-robux-codes-2021_GM431946152.pdf
    • http://www.drent.se/images/minecraft-hacks_GM479516143.pdf
    • http://www.drent.se/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • http://www.drent.se/images/free-robux-card-codes_GM431946152.pdf
    • http://www.drent.se/images/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://www.drent.se/images/roblox-hacked-com-2021_GM431946152.pdf
    • http://www.drent.se/images/games-to-get-free-robux_GM431946152.pdf
    • http://www.drent.se/images/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.drent.se/images/coin-master-spin-link-free-download_GM406889139.pdf
    • http://www.drent.se/images/free-minecraft-texture-packs-java_GM479516143.pdf
    • http://www.drent.se/images/coin-master-free-spin-now_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ec6.bin
d73660b6bfabe291d8a958196d0dadc9e5c519ecea7f3433652d5d0dbc8efced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC6 28384 bytes
font_01_sfnt_off00008e30.bin
287b5d2394ff72b5f9d6ff659c0b1094d0faddb88f00ffb005ed13aab1c96775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E30 19160 bytes

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