Malicious PDF — malware analysis report

Static analysis result for SHA-256 9429bea695da0dbf…

MALICIOUS

PDF

48.8 KB Created: 2021-06-11 03:53:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb5e723e3b7261b42ec06597a8d71c83 SHA-1: d6c07be4048b368774ab23170ace8e7010dfd273 SHA-256: 9429bea695da0dbf36e949a88788ad3f4cbd28920e54ce34c5e9aa5f71e4086c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It contains an embedded URI pointing to a URL that likely hosts a malicious payload or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-get-free-admin-in-your-own-roblox-place-game-hack
    • https://repository.stikesindramayu.ac.id/repository/new-speed-hack-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-coins-coin-master-link_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/spins-for-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-com-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/get-free-robux-generator_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-only_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-download_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-online-game_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-links-for-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-arsenal-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-super-super-happy-face-free_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000545a.bin
8e3178ab3f4934a032bc8ef80e347e2a04c618edcecb801416f970f0b8f50234		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x545A 25152 bytes
font_01_sfnt_off00008eb4.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 2880 bytes
font_02_sfnt_off0000989f.bin
6beee77bf5725d9ec6254cc72fa9e0886ea163a25dc239b53842e2a38f2fa1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x989F 19456 bytes

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