Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffebc53375b4a62…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 22:40:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cf22ab9516548d286b52b79adc619d97 SHA-1: a9818991229f4a11b74b9d4fd859fd51f772bc9a SHA-256: 6ffebc53375b4a62f11f3a8ead6b363542a158077b3304fe006ea69c3079cf53
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into interacting with it, likely to initiate a download. The embedded URI points to a URL associated with game-related exploits, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and heuristics indicate malicious intent, possibly involving JavaScript execution for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-card-codes-game-hack
    • http://www.cuniv-naama.dz/images/free-roebucks-com_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/coin-master-hack-spin-generator_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/coin-master-hack-2021_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/free-robux-generator-2021_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/master-coin-free-spin-daily_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/free-coins-coin-master-iphone_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/free-robux-no-gift-card_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/how-to-actually-get-free-robux_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/free-attacks-on-coin-master_GM406889139.pdf
    • http://www.cuniv-naama.dz/images/roblox-script-hack_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://www.cuniv-naama.dz/images/free-robux-without-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c3.bin
ea6bf5f67b9b82ff6a7926764b077e016273ee467f4d2a54209e7887cff0b585		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C3 26592 bytes
font_01_sfnt_off000086db.bin
79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 18416 bytes

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