Malicious PDF — malware analysis report

Static analysis result for SHA-256 06447678ba24e246…

MALICIOUS

PDF

226.6 KB Created: 2021-07-03 20:45:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cdb7bc59cad49211ba971d9f4c681a97 SHA-1: ab0b4517a8ea87af344cfa605042429f9450dd34 SHA-256: 06447678ba24e24669b8e5b34d543e32735a86d3fa1508a1f0da69ea03e2f6ba
132 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it presents a fake CAPTCHA and a lure to install a browser extension or update. The document body, though heavily obfuscated, contains a URL that likely leads to a malicious download. This suggests a social engineering attack aimed at tricking the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/1094591345/pokemon-go-no-free-remote-raid-pass-game-hack
    • http://gts.edu.gh/library/repository/minecraft-pc-download-free-full-version_GM479516143.pdf
    • http://gts.edu.gh/library/repository/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdf
    • http://gts.edu.gh/library/repository/hack-coin-master-app-ios_GM406889139.pdf
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://gts.edu.gh/library/repository/javascript-roblox-hack-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/sites-that-give-you-free-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://gts.edu.gh/library/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/minecraft-tower-defense-hacked_GM479516143.pdf
    • http://gts.edu.gh/library/repository/free-hair-roblox-2021_GM431946152.pdf
    • http://gts.edu.gh/library/repository/coin-master-free-spins-april-2021_GM406889139.pdf
    • http://gts.edu.gh/library/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdf
    • http://gts.edu.gh/library/repository/free-minecraft-capes-no-mods_GM479516143.pdf
    • http://gts.edu.gh/library/repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/great-robux-hack_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-hack-your-friends-in-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/roblox-hack-generator-download-no-survey_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://gts.edu.gh/library/repository/what-tiktok-free-will_GM835599320.pdf
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-working-with-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031e32.bin
d5cc72996578926295d612904d39ce904b1332d458db53035edf0fa9bffad0ca		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E32 25728 bytes
font_01_sfnt_off00035a6a.bin
a7092ab7f2427fbd6f6201fe289628169c9092d9ba93756d1dde573313253e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35A6A 18756 bytes

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