Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a9a24bc8628f46…

MALICIOUS

PDF

43.7 KB Created: 2021-06-04 02:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e6be21ccf9ef3c99d34965d1757109e2 SHA-1: c82c72a3728063cca5e06f02462e824a04d70fdf SHA-256: 08a9a24bc8628f462bcf8647acbb47a281bec967f99144e705b35a2467d78883
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into clicking a malicious link, likely to download a secondary payload or lead to a phishing page. The embedded URL and numerous similar URLs found in the document body suggest a campaign focused on game-related scams and potentially credential harvesting. No scripts were extracted, limiting further analysis of execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/coin-master-online-hack-no-human-verification-game-hack
    • http://opac.library.uib.ac.id/repository/pokemon-go-free-10km-egg_GM1094591345.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/how-to-hack-coin-master_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/free-coin-master-spins-no-verification_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/coin-master-apk-hack-32_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/earn-robux-for-roblox_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online-generator_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/robuxy-com-free-robux_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/free-spins-coin-master-links-blogger_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/how-to-get-free-roblox-items_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/free-links-for-coin-master_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://opac.library.uib.ac.id//repository/coin-master-hack-injection_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/minecraft-bedrock-hacks_GM479516143.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-no-verify_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-spin-rewards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fd6.bin
45f582592857155966e2ca3e41d2c85eb1784a1ebfed76a088c5a9422860c165		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD6 24964 bytes
font_01_sfnt_off00008822.bin
134a3b787304aed0b6b676c1c78e20bf5ecb3967929c4b7a7c4fe4be2e6ca943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8822 18324 bytes

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