Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7c1d10ccb483dc…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 16:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e9fa1ac42f6b7da0ca231abfd65a19f SHA-1: 2e88ed5e3abf7f25b142bec28a23db3bbbbbcc58 SHA-256: 5c7c1d10ccb483dc6fa7ffb1d26ef70567c9da718fd6093a6b0a8efad58ee566
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA heuristic, indicating a social engineering attempt to trick the user into performing an action. It also embeds multiple URLs pointing to external resources, likely for downloading further malicious content. The document body and embedded URLs suggest a lure related to free in-game items or currency for platforms like Roblox and TikTok.

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/free-admin-on-roblox-free-robux-game-hack
    • http://m-sv.net/images/free-roblox-codes-2021-april_GM431946152.pdf
    • http://m-sv.net/images/free-followers-on-tiktok_GM835599320.pdf
    • http://m-sv.net/images/how-to-hack-in-roblox-prison-life-20_GM431946152.pdf
    • http://m-sv.net/images/earn-free-spins-coin-master_GM406889139.pdf
    • http://m-sv.net/images/free-minecraft-shaders_GM479516143.pdf
    • http://m-sv.net/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://m-sv.net/images/how-to-get-free-robux-working-with-roblox_GM431946152.pdf
    • http://m-sv.net/images/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://m-sv.net/images/free-minecraft-java-edition-account_GM479516143.pdf
    • http://m-sv.net/images/tiktok-free-like_GM835599320.pdf
    • http://m-sv.net/images/cute-free-roblox-clothes_GM431946152.pdf
    • http://m-sv.net/images/hacker-names-on-roblox_GM431946152.pdf
    • http://m-sv.net/images/minecraft-free-unblocked_GM479516143.pdf
    • http://m-sv.net/images/minecraft-windows-10-free-code_GM479516143.pdf
    • http://m-sv.net/images/usernames-and-passwords-hack-roblox_GM431946152.pdf
    • http://m-sv.net/images/25-free-spins-coin-master_GM406889139.pdf
    • http://m-sv.net/images/coin-master-links-2021_GM406889139.pdf
    • http://m-sv.net/images/minecraft-realms-free-trial_GM479516143.pdf
    • http://m-sv.net/images/free-robux-no-human-verification_GM431946152.pdf
    • http://m-sv.net/images/robux-gift-card-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e50.bin
53831ae68aaf51886ffc74c02d0f0451d7cc7719077780f01ecbe2aad3b4cbb3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E50 26016 bytes
font_01_sfnt_off00008abb.bin
e5be177680969cf0805012f3943b28ec17e03a4247be04bcb0b24db0ad4292ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABB 18640 bytes

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