Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8054d949a84ff12…

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 11:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 91f72f69c507e4c4b5afa650f8220e5a SHA-1: d89216e7cdae29b4c4f92fe0e09b029dd953e84b SHA-256: d8054d949a84ff12e28ce585c939ca3dcff82d6d7817bb180cbb39f28a008793
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The document presents itself as a fake CAPTCHA or human verification prompt, a common lure to trick users into downloading malicious content. It contains an embedded URI pointing to a suspicious URL, likely intended to host a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/479516143/free-multiplayer-minecraft-server-game-hack
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-co_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-mster-free_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-time-hack_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/javascript-free-robux_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-generator-no-verification_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/when-was-minecraft-free_GM479516143.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-today-39_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-get-minecraft-java-free_GM479516143.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hacks-to-get-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f9.bin
435c39fb5fc4a4e9297a21c46cf06e8ce0267b9fc67a9254696f0c6c7697964a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F9 21940 bytes
font_01_sfnt_off0000626c.bin
bd2c9319811100d4a63aefc818d44f48b7bf37d9ac2ac9e0807df4b94dfa85a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 18540 bytes

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