Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf5c68beafcc5b1…

MALICIOUS

PDF

45.9 KB Created: 2021-05-18 04:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 35134371e97b48fde66dea6f177f97df SHA-1: 1d62808b482b3ac297847086b8b070d4c62b3f80 SHA-256: dcf5c68beafcc5b19723ab7d705db7d5a96c73b94ed196f84791bb0e96efb418
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to deceive the user into interacting with a malicious link. This is a common social engineering tactic to trick users into downloading further malware. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-promo-code-game-hack, likely serves as the initial download point for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coin-master-free-spins-promo-code-game-hack
    • https://aits.co.id/ckfinder/userfiles/files/roblox-free-login_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/cool-free-minecraft-skins_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-online_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-client_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/como-hackear-coin-master-ios_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-for-kids_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/ios-coin-master-hack_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/www-robux_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-no-survey-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb3.bin
e2b76fed6374a8b53a8fc3869b9980696c5d3e565fe696a773b45b6c5c6c6df5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB3 25292 bytes
font_01_sfnt_off000086bb.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 2824 bytes
font_02_sfnt_off0000905d.bin
dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905D 18476 bytes

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