Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d95ff4782b09090…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 00:41:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 581e5319d34c1a6ff5a09c73503cff2a SHA-1: 53f00e6016ff3685e107d98585edf9705f58b0e9 SHA-256: 0d95ff4782b0909029d0780a44950869dbc8314896536a0676433de777863a2f
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with embedded links. The primary external URI, https://netcdn.xyz/app/406889139/coin-master-tricks-game-hack, suggests a lure for game cheats or hacks. While no scripts were directly extracted, the presence of embedded URIs and the ML classifier's high confidence indicate a malicious intent, likely to download a second-stage payload or redirect to a phishing site.

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/406889139/coin-master-tricks-game-hack
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-games_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-coin-link_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/robux-only_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-redeem-code-free-2021_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/roblox-free-play-no-download_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-coin-master-cheats_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hacks-2021_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-texture-packs-java_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-cheat-codes-free_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdf
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://aits.co.id/ckfinder/userfiles/files/free-roblox-executor-no-key_GM431946152.pdf
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004603.bin
2e6991d60e9246b50d2093e9f08ef64b511e532f04db48f75abf3dc9546cfcb4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4603 26540 bytes
font_01_sfnt_off000081da.bin
72c9dca3f555d15cf680f05a17c83eea5c84cf549c22ff1a640312a233055f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DA 17716 bytes

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