Malicious PDF — malware analysis report

Static analysis result for SHA-256 6836e20d998ccf96…

MALICIOUS

PDF

48.0 KB Created: 2021-05-17 23:31:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fdbb680b363cc6a9c5b9db078996d5ef SHA-1: d372129b94b1286728713e93297a73eac57663b8 SHA-256: 6836e20d998ccf963079baf41eb93d9e4e5cb8081794e3a7310dc6c175abd146
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a potentially malicious file. The embedded URL points to a resource likely containing a game hack or cheat, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/roblox-download-game-hack
    • http://coplaltd.eu/images/oginject-co_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-online-hack_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-hack-xyz_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-hack-online-without-human-verification_GM406889139.pdf
    • http://coplaltd.eu/images/7-year-old-roblox_GM431946152.pdf
    • http://coplaltd.eu/images/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://coplaltd.eu/images/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-raid-hack_GM406889139.pdf
    • http://coplaltd.eu/images/how-do-you-hack-minecraft_GM479516143.pdf
    • http://coplaltd.eu/images/robux-hack-2021_GM431946152.pdf
    • http://coplaltd.eu/images/free-robux-hacker-us_GM431946152.pdf
    • http://coplaltd.eu/images/free-minecraft-hacks_GM479516143.pdf
    • http://coplaltd.eu/images/coin-master-free-coin-hack_GM406889139.pdf
    • http://coplaltd.eu/images/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://coplaltd.eu/images/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-free-spins-cheat_GM406889139.pdf
    • http://coplaltd.eu/images/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://coplaltd.eu/images/free-coins-coin-master-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004963.bin
4e7d4da2189c8ea82ccd28b4b6c602496854dce8102c722f724c0475119a69e9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4963 26772 bytes
font_01_sfnt_off0000870c.bin
f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 7272 bytes
font_02_sfnt_off0000987d.bin
21b28ace4d932993d49d3193db8b098f0f06cc97e3b5056ef7549ebd787d2b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x987D 18520 bytes

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