Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c1cba298fd8719…

MALICIOUS

PDF

46.7 KB Created: 2021-05-19 07:04:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9a1316c3e2c01704869ed5cac5803489 SHA-1: a57950248fb8268ab7182247758a82497587582a SHA-256: 00c1cba298fd87191a222a77f265ec2fdec7e6bf664d0faa8ee195e0aeca6737
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free unlimited Robux' and displays a fake CAPTCHA to trick the user into clicking a malicious link. The embedded URL points to a domain associated with distributing such lures. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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-unlimited-robux-game-hack
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/bloxpage-free-robux_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-roblox-hair-girl_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-spins-coin-master-daily_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/how-long-is-the-minecraft-free-trial_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-roblox-girl-clothes_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-no-human-verification_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/xray-hack_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-apk-mods-coin-master_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/woman-roblox_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-time-hack-2021_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/minecraft-free-play-no-download_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-website_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/roblox-free-items-glitch_GM431946152.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdf
    • https://citramandiribor.com/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004df0.bin
4c5a1e40ac671043543d1cb082d1206cb47a5b647aa856bdcdd807940e79cf3b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF0 30480 bytes
font_01_sfnt_off00009286.bin
c9ac8ff14f07bfa737a68dd52966d36d325e06134ccd0dbc32924edcfa3e5a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9286 18932 bytes

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