Malicious PDF — malware analysis report

Static analysis result for SHA-256 654951789497a332…

MALICIOUS

PDF

227.3 KB Created: 2021-07-03 11:31:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 04b333bf7052445d15d1ed3c9e30c23a SHA-1: 1348dfa702a5fdd34c9bcb2d5887fb979df81926 SHA-256: 654951789497a332b045478c020a50cfd4e4da217097265d720f14cf00825a9b
140 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and presents a fake CAPTCHA and a visual download button, strongly suggesting a social engineering lure. The document body and extracted URLs indicate a theme of 'free hacks' or 'cheats' for games, aligning with a browser extension or plugin installation scam. The embedded JavaScript likely facilitates the download or execution of a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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-free-candy-hack-game-hack
    • https://www.mierepair.com/uploaded_files/userfiles/files/rise-of-nations-cheats-roblox_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-games-coin-master_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-roblox-accounts-that-work_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-no-survays_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/pokemon-go-free-candy-hack_GM1094591345.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-hacks-cheats-gold_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-minecraft-texture-packs-java_GM479516143.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/ios-coin-master-hack_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-hack-2021_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-114-4-download-free_GM479516143.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/get-free-robux-if-you-finsh-ths-obby_GM431946152.pdf
    • https://www.mierepair.com/uploaded_files/userfiles/files/i-want-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off0003215d.bin
1815c0bb3a74b3d58b755211d305be0d4e8827c7a2f3e4565949c11f96db78fe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3215D 25576 bytes
font_01_sfnt_off00035d59.bin
974fec6a7fb8b801d29365c852e87c700e9843ab8afa704437d6301bca4cc258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35D59 18712 bytes

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