Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbeb374d41214fd…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 10:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 672f91b38efddef6d4ec71c3da6d2128 SHA-1: 5b4a9bb8312d0633911204b532b0e04b0403b8a8 SHA-256: 6cbeb374d41214fd0f2a054c142797d1b3af538150bf68a31619da571659fb48
82 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a primary external URI pointing to sites offering hacks for games like Coin Master and Roblox. The presence of a 'password-protected archive lure' heuristic suggests the document is designed to trick users into downloading an encrypted payload, likely to bypass security measures. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/406889139/coin-master-free-spins-hack-but-no-surveys-game-hack
    • http://library.acehresearch.org/repository/easy-points-gg_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-hacks-no-human-verification_GM406889139.pdf
    • http://library.acehresearch.org/repository/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • http://library.acehresearch.org/repository/roblox-free-robux-codes_GM431946152.pdf
    • http://library.acehresearch.org/repository/rbxfree-com-free-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/how-do-you-get-free-roblox_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://library.acehresearch.org/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-daily-spins-from-coin-master_GM406889139.pdf
    • http://library.acehresearch.org/repository/tiktok-viewer-free_GM835599320.pdf
    • http://library.acehresearch.org/repository/getrobux-ninja_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-spin-link-for-coin-master_GM406889139.pdf
    • http://library.acehresearch.org/repository/minecraft-windows-10-free_GM479516143.pdf
    • http://library.acehresearch.org/repository/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://library.acehresearch.org/repository/roblox-login-hack_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-co_GM431946152.pdf
    • http://library.acehresearch.org/repository/minecraft-free-minecraft_GM479516143.pdf
    • http://library.acehresearch.org/repository/roblox-password-hacker_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005246.bin
35f869fcd33ac9960c83dd6bb0660fba44b7c1bab799f7569e61d6bfa4322b2d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5246 25316 bytes
font_01_sfnt_off00008c21.bin
e0937bcd33a3b629f0687db8d98eacd8293f1078019919402bc9ac6e2a33e1b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C21 18708 bytes

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