Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf72c548b38891c…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 14:30:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f3aeebb3068ca04dfcd9d2a0ab378da6 SHA-1: f43f31693ae2056dae630bd6bedcea91b362bd3a SHA-256: 8bf72c548b38891c6e9151a063c1bb2709cca0b08fe918f98108e7012a620724
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains lures for game hacks and exploits, specifically mentioning 'Coin Master Hacks Reddit' and requesting 'recovery secret / private key'. The embedded URLs point to suspicious domains that likely host malicious payloads. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to trick the user into downloading and executing a secondary stage, likely a downloader or infostealer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-hacks-reddit-game-hack
    • http://a1scan3d.com/images/what-do-points-do-in-roblox_GM431946152.pdf
    • http://a1scan3d.com/images/game-coin-master-hack_GM406889139.pdf
    • http://a1scan3d.com/images/coin-master-pc-game-free-download_GM406889139.pdf
    • http://a1scan3d.com/images/roblox-free-hats_GM431946152.pdf
    • http://a1scan3d.com/images/free-robux-hacker-us_GM431946152.pdf
    • http://a1scan3d.com/images/free-spin-sites-for-coin-master_GM406889139.pdf
    • http://a1scan3d.com/images/roblox-password-hacker_GM431946152.pdf
    • http://a1scan3d.com/images/rbx-land-free-robux_GM431946152.pdf
    • http://a1scan3d.com/images/como-hackear-coin-master_GM406889139.pdf
    • http://a1scan3d.com/images/free-money-and-spins-coin-master_GM406889139.pdf
    • http://a1scan3d.com/images/claimrobux-net_GM431946152.pdf
    • http://a1scan3d.com/images/www-rbx-com_GM431946152.pdf
    • http://a1scan3d.com/images/how-do-you-hack-minecraft_GM479516143.pdf
    • http://a1scan3d.com/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdf
    • http://a1scan3d.com/images/robux-hack-tools_GM431946152.pdf
    • http://a1scan3d.com/images/free-spin-codes-coin-master_GM406889139.pdf
    • http://a1scan3d.com/images/free-spin-coin-master-app-download_GM406889139.pdf
    • http://a1scan3d.com/images/coin-master-real-free-spins_GM406889139.pdf
    • http://a1scan3d.com/images/coin-master-hacks-free-spins_GM406889139.pdf
    • http://a1scan3d.com/images/how-to-get-free-shirts-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_off000046b8.bin
f8b9644aef6f6a4deffae28741b040c911d71eb7d50977b11a28873ab5ba6a1d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46B8 25372 bytes
font_01_sfnt_off00008193.bin
63a6a5d9916b9ee5af7207625cec6907b74dd50493b17e0c9eae8777c3cfd91e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8193 17888 bytes

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