Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd9bc0f406d9a8b…

MALICIOUS

PDF

44.9 KB Created: 2021-06-10 19:49:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c0435f44c0f698edcf9aba217af318b9 SHA-1: 6ba9fc003080df7ae449426a2eda9abc7b12f488 SHA-256: 6bd9bc0f406d9a8bf2c299e1d073a6f81a6a465b8fb66dfa0f59c6069d206097
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It also contains an embedded URI pointing to a suspicious URL, likely intended to lead the user to download a second-stage payload. No scripts were extracted, limiting further analysis of the execution flow.

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.tw/app/431946152/free-roblox-games-to-play-now-game-hack
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-hack-generator_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-easy_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-com-no-verification_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/hack-de-roblox-adopt-me_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-money-in-roblox-jailbreak-on-ipad_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-please-work_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-free-gold-cards_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/op-rewards-free-robux_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/what-is-coin-master_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/xbox-roblox-free_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/best-tricks-co-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051df.bin
7f1c70c35e932c9638996f1bc0a5001c16764a3e2aa617b6301c4ec4a745f323		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DF 24848 bytes
font_01_sfnt_off00008b2c.bin
8cc6dbe05ee2d699949d2a0e20a0957b7cf3273fe3c78873575b59dfa583d159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 18936 bytes

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