Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd7fb6ded6373b4…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 05:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5958440e821a2d1eb182ca7c17ff7624 SHA-1: d9989dfe3c2c4aaf2fde1ee0d9c00f317ec35947 SHA-256: 3fd7fb6ded6373b4967ccae94d7be2973fcae8da26309ed068ce447a47838ca7
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into clicking an embedded link, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URLs suggests an attempt to redirect the user to a malicious site for payload delivery. No scripts were extracted, limiting further analysis of the execution chain.

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/431946152/how-to-use-cheats-in-roblox-game-hack
    • http://www.library.gkigadingserpong.org/repository/how-to-earn-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/free-robux-groups-2021_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/appsmob-coin-master-hack_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/how-to-actually-get-free-robux_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/free-robux-2021_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/get-me-free-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/minecraft-hacks-xbox_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/claimrobux-net_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/free-minecraft-addons_GM479516143.pdf
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-download-android_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/rewardex-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/roblox-fly-hack_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-free-pet-food_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/code-free-robux_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/coinmaster-hack_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/giftrobux-com-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f4b.bin
7758fba90e40d5318634cc16b6d68627790f709a18b61b688e7dae27f652c3dc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4B 24308 bytes
font_01_sfnt_off000086e1.bin
737332e260adcde7f25dddc33fa5b740dde017ec25756bd861342e1c2071bdcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E1 18632 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.