Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2a00587436dfd1…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 03:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d00a04497e30a1026f3d611ca333528 SHA-1: bd5b0f5ac31cb761bec33ac4a9aed262ac44e834 SHA-256: 4d2a00587436dfd15520b7abb2d282acd7fc6cd9f9f472860bd1e93aed46d471
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample presents a fake CAPTCHA or human verification prompt to trick the user into interacting with the document. It contains numerous embedded URLs, one of which is directly linked to a potential malware download. 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.tw/app/431946152/roblox-bee-swarm-simulator-free-honey-game-hack
    • http://www.fkunismuh.org/perpustakaan/repository/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/8bp-hack-coin-master_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/app-store-coin-master-free-spins_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/2021-free-spins-coin-master_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-scam_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/claim-free-robux_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/hacks-para-robar-todo-sin-hacer-nada-en-roblox-jailbreak_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/free-coins-coin-master-link_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan//repository/minecraft-online-free-download_GM479516143.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdf
    • http://fkunismuh.org/perpustakaan/repository/roblox-groups-with-free-clothes_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan/repository/free-minecraft-packs_GM479516143.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/microsoft-bing-robux_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/who-to-get-free-robux_GM431946152.pdf
    • http://fkunismuh.org/perpustakaan//repository/wurst-client-download_GM479516143.pdf
    • http://fkunismuh.org/perpustakaan/repository/free-ways-to-get-robux_GM431946152.pdf
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://fkunismuh.org/perpustakaan//repository/roblox-free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ea.bin
61a55a765600032f5672964711a7ec0eb3dc38cf205f0d2e8a96d56986817970		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EA 25552 bytes
font_01_sfnt_off00008e38.bin
0306bde13a542630b4b14baa7e655c0e6d9f885c30fc61752a3450c3acea3db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E38 19144 bytes

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