Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb5b37d9e410e80…

MALICIOUS

PDF

227.8 KB Created: 2021-07-05 05:40:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5e83871b565a383ba3eb87507690299 SHA-1: 7a8d9546c47d3961cc616d9b6ca015efcac45b40 SHA-256: dcb5b37d9e410e803403218aa33a3ab9e1009fcb199a5a3a9cf7a64dccf4f641
132 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, including a fake CAPTCHA and a lure to install a browser extension or update. It also contains an embedded URL pointing to a site offering a 'pokemon-go-free-xp-game-hack', suggesting a lure for potentially malicious downloads or scams. The document body, though heavily obfuscated, contains references to the same URL.

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-free-xp-game-hack
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/como-hackearle-la-cuenta-a-alguien-en-roblox_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-group-rank-hack_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-generator-online-no-survey-no-human-verification_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-alt-accounts-roblox_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/oprewards-robux_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-and-obc-generator_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/pro-free-spins-coin-master_GM406889139.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-top_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-roblox-outfits-and-more_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-hack-roblox-using-cheat-engine-63_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-thomas-wooden-railway-free-demo_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/robux-free-without-offers_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/hack-prison-life-roblox-2021-pc-dansploit_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-getting-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off0003238b.bin
d445f3794e3c386e27ec8f6a794f0dae19e6c81d2c361498a8bca8ec17e1552d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3238B 25576 bytes
font_01_sfnt_off00035f81.bin
85b8a7aa3b3860410ec0c42b5b83433c4422eca5ec83a4d255e0e16ef44453fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35F81 18764 bytes

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