Malicious PDF — malware analysis report

Static analysis result for SHA-256 83555f520f65549f…

MALICIOUS

PDF

45.1 KB Created: 2021-06-13 20:44:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 09174d3ca95284301b240e35cb038a58 SHA-1: 234a4150a08626a2eb224b3b9417b7b9f11784b5 SHA-256: 83555f520f65549f6f2d8e8527ba5869b42ae94f57fcc857a23fe86f0d27aa2d
90 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to deceive users into downloading a potentially malicious executable. The document body contains a URL pointing to a file named 'free-robux-hack-exe-game-hack', which is likely the payload. Numerous other URLs embedded within the document also suggest a theme of free game-related hacks or cheats, further supporting the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 5

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://netcdn.co/app/431946152/free-robux-hack-exe-game-hack
    • https://elite-house.su/images/free-coins-on-coin-master_GM406889139.pdf
    • https://elite-house.su/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://elite-house.su/images/comment-hacker-le-jeux-roblox-sur-buku-no-roblox_GM431946152.pdf
    • https://elite-house.su/images/free-minecraft-mods_GM479516143.pdf
    • https://elite-house.su/images/free-robux-without-doing-anything_GM431946152.pdf
    • https://elite-house.su/images/free-roblox-jailbreak-games_GM431946152.pdf
    • https://elite-house.su/images/free-robux-obby-2021_GM431946152.pdf
    • https://elite-house.su/images/free-robux-exe_GM431946152.pdf
    • https://elite-house.su/images/is-minecraft-free_GM479516143.pdf
    • https://elite-house.su/images/roblox-e-free_GM431946152.pdf
    • https://elite-house.su/images/minecraft-hacked-client-bedrock_GM479516143.pdf
    • https://elite-house.su/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • https://elite-house.su/images/free-robux-without-verify_GM431946152.pdf
    • https://elite-house.su/images/minecraft-pe-hacks-2021_GM479516143.pdf
    • https://elite-house.su/images/coin-master-hack-mod-game-download_GM406889139.pdf
    • https://elite-house.su/images/minecraft-pe-hack-client_GM479516143.pdf
    • https://elite-house.su/images/free-robux-hacks-no-verification_GM431946152.pdf
    • https://elite-house.su/images/free-robux-no-download_GM431946152.pdf
    • https://elite-house.su/images/free-coinmaster-spins_GM406889139.pdf
    • https://elite-house.su/images/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1c.bin
41fbc928cf4a779ef3342c4f57a580b1a0d92228632b7641f176fb37ff27fedb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1C 24892 bytes
font_01_sfnt_off000083d3.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D3 2844 bytes
font_02_sfnt_off00008d94.bin
5178aa0e71839f0c1ac9c0cad5c8c192e0e748144b4119805e0e2ff6a1f565e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 18412 bytes