Malicious PDF — malware analysis report

Static analysis result for SHA-256 1337d06c04b77d35…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 08:06:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93bf6c959bc65136972d41bda4398fbb SHA-1: f48f569e6689d244524ac217450cfe0895f6534e SHA-256: 1337d06c04b77d35a6e5b6746530b0321fbe0e08073a2540cb78c4a79abf8974
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to lure the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that is likely a download for a malicious payload. No scripts were extracted from this sample, limiting further analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-girl-hair-not-a-model-game-hack
    • http://opac.kolejkrim.edu.my/repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/free-2021-robux_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/is-minecraft-java-free_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/how-to-win-free-robux_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/free-minecraft-coins_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/free-coin-master-cards_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-sexually-abused_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-for-today_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-c9m_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-free-rubox_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-apocalypse-rising-hack_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/free-minecraft-severs_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-ios_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/hack-de-coin-master_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/bloxpage-free-robux_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/how-can-i-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000512f.bin
d6d5e4f9bf6309980abd8011a5df5f7ebc4acbbda3002339594a34702f8ad020		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512F 25096 bytes
font_01_sfnt_off00008b71.bin
66482e13b1b0d91169bd4f4980226da82ba760cd479aff25d2e3a1e388705405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B71 18772 bytes

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