Malicious PDF — malware analysis report

Static analysis result for SHA-256 2604a177e1a81788…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 16:12:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fb79ee29b11121b5ed03e567bed8d35e SHA-1: 7b5eec09de86dd6d15d1a2eef3a7841dc97c1c9f SHA-256: 2604a177e1a817882a28fb035adbf8093c117b3b20a04103e6ac76aff015b861
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded URL points to a domain known for hosting malicious content, suggesting the document is designed to lead users to a download or exploit. No scripts were extracted, but the presence of external URIs and the ML classifier's high confidence indicate malicious intent.

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.tw/app/431946152/free-roblox-cards-pin-number-2021-game-hack
    • http://lawpatron.ru/images/hacks-for-roblox-jailbreak_GM431946152.pdf
    • http://lawpatron.ru/images/free-robux-without-human-verification_GM431946152.pdf
    • http://lawpatron.ru/images/roblox-free-robux_GM431946152.pdf
    • http://lawpatron.ru/images/roblox-free-robux-generator_GM431946152.pdf
    • http://lawpatron.ru/images/arsenal-hacks-roblox_GM431946152.pdf
    • http://lawpatron.ru/images/is-roblox-being-hacked-2021_GM431946152.pdf
    • http://lawpatron.ru/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://lawpatron.ru/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdf
    • http://lawpatron.ru/images/coin-drop-master-free_GM406889139.pdf
    • http://lawpatron.ru/images/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://lawpatron.ru/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdf
    • http://lawpatron.ru/images/coin-master-daily-bonus-hack_GM406889139.pdf
    • http://lawpatron.ru/images/coin-master-spins-hack_GM406889139.pdf
    • http://lawpatron.ru/images/huskybuckscom-free-robux_GM431946152.pdf
    • http://lawpatron.ru/images/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://lawpatron.ru/images/free-robux-no-password_GM431946152.pdf
    • http://lawpatron.ru/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://lawpatron.ru/images/how-to-get-free-mods-in-minecraft_GM479516143.pdf
    • http://lawpatron.ru/images/coin-master-daily-link_GM406889139.pdf
    • http://lawpatron.ru/images/free-daily-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d33.bin
06feb32eb1c03cfd12577f82a2d4e7519d8cfdf662cf756a7acc4cbd42e150b8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D33 26060 bytes
font_01_sfnt_off00008987.bin
6f5e23832afdba6a03f90b1a3a4f240f6579301236af20f6a1e20d91e9325611
pdf-font-stream PDF embedded font (sfnt) at offset 0x8987 19428 bytes