Malicious PDF — malware analysis report

Static analysis result for SHA-256 672b5a1e35ab156a…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 03:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f97459e809ae78e2de4c353a61929c32 SHA-1: 7a62fbdf2b5a42c254ed4f63dd34f5480892853b SHA-256: 672b5a1e35ab156ab53cc68c4191d574924e1ca1ff4df56c652e3a9a3fa39ad4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a method to obtain free Robux, employing a fake CAPTCHA lure to trick users into clicking embedded links. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-without-human-verification-on-iphone-game-hack, is highly suspicious and likely leads to a malicious download or phishing page. No scripts were extracted, but the PDF structure and heuristics indicate a social engineering attempt to drive users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-without-human-verification-on-iphone-game-hack
    • http://library.ft.upnvj.ac.id/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/cuentas-hackeadas-de-roblox_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spin-software_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-robux-instantly_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/get-free-robux-promo-codes-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-bee-swarm-simulator-free-honey-generator_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-tshirts-roblox_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-download-pc-free_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/bloxburg-roblox-hacks_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/free-roblox-21-02-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000340f.bin
56c2e2ff8cabd973c7fe7152c6149016f0ad18770f6d61c91005cd2085ae4134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x340F 21968 bytes
font_01_sfnt_off00006402.bin
2fc06e404be7d0c7614f2f5871ca717daf970ee8afbf8242b7ddce45419bdbbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 20040 bytes

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