Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95045cae61c901d…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 08:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a699c9e1a4f687fe8b07a7fffa57b75b SHA-1: f1d287c5358d15437dc79168b5d391080da44fee SHA-256: b95045cae61c901d3fcf65aec53e838215f7f23f9facc6b4ff9b669c5526e77e
82 Risk Score

Malware Insights

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

The document presents itself as a fake CAPTCHA or download prompt, aiming to trick the user into interacting with it. It contains an external URI pointing to a suspicious URL, likely intended to host a malicious payload or redirect to a phishing site. The presence of multiple similar URLs suggests a campaign distributing lures for games and hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/rbx-place-free-robux-game-hack
    • http://astdubai.co/userfiles/files/john-doe-roblox-hacker_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • http://astdubai.co/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • http://astdubai.co/userfiles/files/minecraft-net-free_GM479516143.pdf
    • http://astdubai.co/userfiles/files/change-roblox-username-free_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://astdubai.co/userfiles/files/free-roblox-boy-hair_GM431946152.pdf
    • http://astdubai.co/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdf
    • http://astdubai.co/userfiles/files/coin-master-new-cards-hack_GM406889139.pdf
    • http://astdubai.co/userfiles/files/abd-roblox_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-minecraft-coins_GM479516143.pdf
    • http://astdubai.co/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://astdubai.co/userfiles/files/real-robux-codes_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/script-executor-roblox-free_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://astdubai.co/userfiles/files/free-roblox-clothes-templates_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://www.nrzroblox.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004780.bin
b0d46ac5bf12cc9d01563589ad0f5c577255611ff4d67f4c2bf587496679b145		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4780 25252 bytes
font_01_sfnt_off00008101.bin
30b20ae3df441f067d6970d2fc85ed95190924e4fa28fb295b294374bf1be820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 18472 bytes

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