Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2133f22c1719ed…

MALICIOUS

PDF

227.3 KB Created: 2021-07-06 05:46:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cbe7dc73c4217ba08ff61027aecb68f1 SHA-1: 5b96f327992853c6d413e7512c73d55986da7bc6 SHA-256: 3c2133f22c1719ed16fe8af57596ea080afbe323c9084bbd43c5b19660a8dea4
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 browser extension installation lure, to trick the user into downloading a payload. The embedded URL points to a site offering 'free coins' for a game, a common lure for malware distribution. The document's content and heuristic firings strongly suggest an attempt to trick the user into executing a malicious file.

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-coins-no-survey-game-hack
    • https://lib.unitri.ac.id/repository/coin-master-cheats_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/greasyfork-free-robux-script_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/hectic-plays-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-a-free-radio-in-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/hack-coins-pizzeria-roleplay-remastered-roblox-cheat-engine_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/assassin-roblox-hack-script-cheat-engine_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/clean-master-hack-coins_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-arsenal-hacks_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/coin-master-game-for-pc-free-download_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/i-want-to-break-free-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/games-that-give-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/10-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off000320de.bin
a697f615e9a481127683bf4cb1644f8e688ba53dadbbda006ca0da7cd1072bd5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320DE 25576 bytes
font_01_sfnt_off00035ce2.bin
c567f79e27536698ed8f971733710df8bc9c6297894e7afc9254fd6c1a4ad724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35CE2 18912 bytes

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