Malicious PDF — malware analysis report

Static analysis result for SHA-256 7635408064aab4b9…

MALICIOUS

PDF

46.2 KB Created: 2021-05-15 07:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d2d909cac61a6504bae2ef667368a69f SHA-1: d0bde0b391d32489a47d111b9fe970c2348df389 SHA-256: 7635408064aab4b90dfccaea58b00f5002f958eb125730b9ec9563f38d930785
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, designed to trick users into interacting with it. It also embeds external URIs pointing to potentially malicious content, such as 'https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-today-gift-reward-game-hack'. The ML classifier also flagged this PDF as malicious with high confidence. The overall goal appears to be to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/406889139/coin-master-free-spins-and-coins-today-gift-reward-game-hack
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/wurst_GM479516143.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-play-online-free_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/microsoft-robux_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/minecraft-auto-miner-hack_GM479516143.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-hack-mobile_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-home_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coinmaster-blogspot_GM406889139.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/robux-get-com_GM431946152.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdf
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-hack-ios_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005026.bin
6217f73e00e5b06be0c7108b5bc946a1d76344c6da5bc57d5a7e7439ab3e8050		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5026 24268 bytes
font_01_sfnt_off000087f7.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F7 2840 bytes
font_02_sfnt_off000091a8.bin
20323906fae34ef48fb3028b175607ed26afea8233a7a83525bcd6516f32abbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A8 18404 bytes

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