Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e431cd82144cc6…

MALICIOUS

PDF

46.4 KB Created: 2021-05-12 04:31:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a6f87c483e3ed59d2babd9a5fd341578 SHA-1: 902a165a0814ab887de823e72eb46e3248e88e2b SHA-256: 09e431cd82144cc6e0e3c435159352be35d96723da525d92c7a7a4c74b2f9724
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA, a common lure to trick users into interacting with malicious content. It contains multiple embedded URLs, including one pointing to 'netcdn.xyz', which likely serves as a landing page or download source for a second-stage payload. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/free-spin-link-in-coin-master-game-game-hack
    • http://d-cision.nl/images/krnl-download_GM431946152.pdf
    • http://d-cision.nl/images/coin-master-hack-pro_GM406889139.pdf
    • http://d-cision.nl/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://d-cision.nl/images/minecraft-free-games-no-download_GM479516143.pdf
    • http://d-cision.nl/images/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://d-cision.nl/images/how-do-you-hack-minecraft_GM479516143.pdf
    • http://d-cision.nl/images/free-robux-generator-2021_GM431946152.pdf
    • http://d-cision.nl/images/roblox-a_GM431946152.pdf
    • http://d-cision.nl/images/xray-mod-minecraft-114_GM479516143.pdf
    • http://d-cision.nl/images/earn-free-spins-in-coin-master_GM406889139.pdf
    • http://d-cision.nl/images/minecraft-hacks-wurst_GM479516143.pdf
    • http://d-cision.nl/images/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://d-cision.nl/images/coin-master-unlimited-spins-hack_GM406889139.pdf
    • http://d-cision.nl/images/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • http://d-cision.nl/images/how-do-you-earn-robux-on-roblox_GM431946152.pdf
    • http://d-cision.nl/images/minecraft-free-reddit_GM479516143.pdf
    • http://d-cision.nl/images/roblox-old-avatar_GM431946152.pdf
    • http://d-cision.nl/images/get-free-robux-today_GM431946152.pdf
    • http://d-cision.nl/images/coin-master-free-spins-hack-download_GM406889139.pdf
    • http://d-cision.nl/images/coin-master-34-6-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aeb.bin
a6cfcbc2edce715ed7f0f9259cb317a948f01aad0ac09541bca16ca784ea3fd5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEB 25768 bytes
font_01_sfnt_off00008634.bin
c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 3560 bytes
font_02_sfnt_off000092ba.bin
83e319b57b25df8003591b2f8cd8f74939fd682d39c72f42c8d3fdd92a1d2569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BA 18316 bytes

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