Malicious PDF — malware analysis report

Static analysis result for SHA-256 774b6654f680ac06…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 10:44:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 11430fc0d05e421a925e36264a2759f5 SHA-1: 7b6609c6c27cc18b91fce3ab01e0f1523ddfb6f9 SHA-256: 774b6654f680ac06d9921137aa10b6d93829543f97168bb4f2f9178f2e60ad4c
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, a common lure to trick users into interacting with malicious content. It contains an embedded URI pointing to a URL associated with 'free robux offers', suggesting a scam or phishing attempt. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to lead the user to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-free-robux-offers-game-hack
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-windows-10-hacked-client_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/como-conseguir-el-egg-hunt-de-hacker-roblox_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/youtube-roblox-hack-by-rox-exploits_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-classic-free_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/dino-sim-roblox-apk-to-albino-terror-for-free_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-views-no-verification_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-toys-for-free_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/robux-matchcomfree-robux_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-hack-someone-on-roblox-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-phantom-forces-hack-script-pastebin_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy-no-survey_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/error-connecting-pipe-3-roblox-hacks_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-name-tag-hacks_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-master_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-hats-for-free-no-inspect-roblox_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generators-that-actually-works-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054a3.bin
2aa812b6bb64e8f05841265adc9913da3e330f035639c6bde0d601eb5322b570		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A3 25644 bytes
font_01_sfnt_off00008fce.bin
7d8906a4b68cd270d42a00a841e8857f07e9712c4b896092077e3e64eea6a551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCE 18088 bytes

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