Malicious PDF — malware analysis report

Static analysis result for SHA-256 53754986a7497935…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 00:43:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1d1b9a6b0912cdca004b3a3bea418c07 SHA-1: 888086b036a9e429a173c2cd670a9aa020ed514c SHA-256: 53754986a7497935423450ebb11456fe84a968efa97c07ebf0634af65cb514a6
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 users into downloading a potentially malicious file, as indicated by the ML classifier and the presence of numerous game-hack-related URLs. The primary URL, https://netcdn.xyz/app/406889139/coin-master-hack-for-android-game-hack, is likely the download location for a second-stage payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game cheats for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-for-android-game-hack
    • http://digilib.ulm.ac.id/pusat/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hacks-android_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-hair-boy_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-minecraft_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-free-minecraft_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-mods_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-coin-master-link-download_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-links-coin-master_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048bb.bin
336fb4671e2ca05a317467913ed8374ac3ddca17294979ea8c08bebc8a8ad2b8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 25480 bytes
font_01_sfnt_off00008293.bin
59174fbff90841f3d82b951a67024dd49c53f2706d138598019600dd1f76f1a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8293 18056 bytes

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