Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22dfe137629e968…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 18:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc0207abc125fb7de0a87fd2fc711dfc SHA-1: 54ca9581ab071b30f488c3b4a00e3eb3ec7399fd SHA-256: b22dfe137629e9689c2538a6dee522d7cf7ac3805550dd06d45d44b9389b58ee
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 multiple URLs, including one pointing to 'netcdn.xyz', which likely serves as a download or redirection point for a second-stage payload. The presence of these elements and the ML classifier's high confidence score indicate a malicious intent to exploit user interaction for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-roblox-gift-card-codes-game-hack
    • http://alroglobal.com/images/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://alroglobal.com/images/coin-master-free-daily-spins_GM406889139.pdf
    • http://alroglobal.com/images/coin-master-coins-free_GM406889139.pdf
    • http://alroglobal.com/images/robux-websites-that-work_GM431946152.pdf
    • http://alroglobal.com/images/free-coin-link-coin-master_GM406889139.pdf
    • http://alroglobal.com/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://alroglobal.com/images/free-roblox-wings_GM431946152.pdf
    • http://alroglobal.com/images/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://alroglobal.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://alroglobal.com/images/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://alroglobal.com/images/minecraft-windows-10-hacked-client_GM479516143.pdf
    • http://alroglobal.com/images/hack-coin-master-net_GM406889139.pdf
    • http://alroglobal.com/images/robux-win_GM431946152.pdf
    • http://alroglobal.com/images/coin-master-email-rewards-link_GM406889139.pdf
    • http://alroglobal.com/images/roblox-phantom-forces-hack_GM431946152.pdf
    • http://alroglobal.com/images/coin-master-free-spin-link-list_GM406889139.pdf
    • http://alroglobal.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://alroglobal.com/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://alroglobal.com/images/download-coin-master-hack_GM406889139.pdf
    • http://alroglobal.com/images/coin-master-spins-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004829.bin
d8eac6eb0b7429adde2f112cdbeee9ab9dea8fb920821c7f772dfdbd9c0a5f56		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4829 24312 bytes
font_01_sfnt_off00007fa4.bin
ffbc77db5113ad0b7fd344ce16d81dafdbf0c64cd7df39142b32362cc1b263a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA4 18572 bytes

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