Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c4b57c71b7024c…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 15:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f20476360c50b3bd99c4888b80c163a0 SHA-1: 6ae2fd018b53fef36dc3298fc66cbae0c79cc68a SHA-256: 70c4b57c71b7024c40c0de9a6bca126e59d642974725d74f16b58e498e0b0226
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 trick the user into downloading a file, likely a malicious payload. The embedded URLs point to various game-related download pages, suggesting a lure for free game items or hacks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-studio-free-download-1.0-game-hack
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-hacking-computer-destroyed_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/case-opener-hack-roblox_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/robux-hack-no-verification_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/game-give-free-robux_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-spin-cheat_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/master-coin-free-link_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://www.otomasi.uinjambi.ac.id/repository/free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004feb.bin
49935271b2d319013896b4241dbcf87f3631ce96ef67db5e088ecdfd9d18e7ff		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEB 27120 bytes
font_01_sfnt_off00008d0e.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 2880 bytes
font_02_sfnt_off000096f9.bin
2de7d2aa6ad8ed32de56fa2e9287d97254f647f0a61a7be7f80a8ab18c265f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F9 19388 bytes

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