Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54b2dc9b2b87211…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 07:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 943881876438d77ab56f2fa18c0b3c78 SHA-1: 9af1557b83417bf1ec9d2b273b9f6e31e4e67293 SHA-256: d54b2dc9b2b872116085985ff694a563cafa2c135fd47f4d8b0d18fcc20fb021
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with it, which is a common social engineering tactic. It contains an embedded URI pointing to a URL that likely hosts a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/how-do-you-get-free-pet-food-in-coin-master-game-hack
    • http://lib.untad.ac.id/repository/games-for-robux_GM431946152.pdf
    • http://lib.untad.ac.id//repository/roblox-free-online-game_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://lib.untad.ac.id/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://lib.untad.ac.id/repository/coin-master-hack-2021-app-download_GM406889139.pdf
    • http://lib.untad.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-game-hack_GM406889139.pdf
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-make-a-shirt-on-roblox-for-free_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-hack-no-download_GM406889139.pdf
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • http://lib.untad.ac.id/repository/free-likes-for-tiktok_GM835599320.pdf
    • http://lib.untad.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://lib.untad.ac.id/repository/synapse-roblox-free-download_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-data-breach_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdf
    • http://lib.untad.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://lib.untad.ac.id/repository/roblox-apk-hack_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdf
    • http://lib.untad.ac.id/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004de7.bin
e7d1a6b0000d1e24746a850d854ae34bde0f69f94144ba803b5ad99edf092d6b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE7 24212 bytes
font_01_sfnt_off000084c7.bin
b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C7 2880 bytes
font_02_sfnt_off00008eb2.bin
cff39daf026dc40ed6ecaa9210f7f2c1a86de44fdb8191942dcd9a9d80f52395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB2 18672 bytes

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