Malicious PDF — malware analysis report

Static analysis result for SHA-256 93761f9489644eab…

MALICIOUS

PDF

46.0 KB Created: 2021-06-04 04:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 56589a35d0fae1751da3b0e90218d207 SHA-1: 53ebc8986d9569db91df86cd63634d278c5c8197 SHA-256: 93761f9489644eab0cd8407a0f9ee25508e08b457d336867762ad94d052ef30c
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick users into clicking a link. This link, 'https://netcdn.online/app/431946152/roblox-live-free-robux-game-hack', likely leads to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/roblox-live-free-robux-game-hack
    • http://digilib.iailm.ac.id/repository/robuxy-com-free-robux_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/claim-free-robux_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/coin-master-hack-spin-generator_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdf
    • http://digilib.iailm.ac.id/repository/impact-minecraft-hack_GM479516143.pdf
    • http://digilib.iailm.ac.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://digilib.iailm.ac.id/repository/robux-today_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdf
    • http://digilib.iailm.ac.id//repository/free-spins-coin-master-android_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdf
    • http://digilib.iailm.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdf
    • http://digilib.iailm.ac.id/repository/coin-master-daily-spins_GM406889139.pdf
    • http://digilib.iailm.ac.id//repository/tiktok-free-view-iphone-survey_GM835599320.pdf
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://digilib.iailm.ac.id//repository/minecraft-pe-server-hosting-free_GM479516143.pdf
    • http://digilib.iailm.ac.id/repository/coin-master-free-bonus_GM406889139.pdf
    • http://digilib.iailm.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • http://digilib.iailm.ac.id//repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdf
    • http://digilib.iailm.ac.id//repository/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e85.bin
ddee6071c9d9b1b96b4113d5562eff4bf39a97d47b033f42dd3d4d1cc2c8fa60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E85 30112 bytes
font_01_sfnt_off00009169.bin
c2dd8c83000adcacda99da2837b7aa277d52104d0bcd6955dc9295d08d088394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9169 18324 bytes

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