Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90298a23090c8f9…

MALICIOUS

PDF

32.1 KB Created: 2021-07-21 19:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eefca8326dea0c795428ce32a1e31ff7 SHA-1: 75044fa84eb1aca312999201547ee4935c3006ac SHA-256: c90298a23090c8f97c68b86d6e2b97800d37665b8058c7526f691c7442d11e72
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or download lure to trick the user into clicking a link. The primary external URI, http://netcdn.tw/app/835599320/tiktok-viewer-free-game-hack, is likely the destination for a malicious payload or phishing page. The document body contains multiple URLs related to game hacks and free accounts, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/835599320/tiktok-viewer-free-game-hack
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://perpustakaan.stami.ac.id/repository/free-minecraft-server-maker_GM479516143.pdf
    • https://perpustakaan.stami.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdf
    • https://perpustakaan.stami.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://perpustakaan.stami.ac.id/repository/free-tiktok-accounts_GM835599320.pdf
    • https://perpustakaan.stami.ac.id/repository/roblox-hack-com_GM431946152.pdf
    • https://perpustakaan.stami.ac.id/repository/rblx-city-free-robux_GM431946152.pdf
    • https://perpustakaan.stami.ac.id/repository/free-robux-offers_GM431946152.pdf
    • https://perpustakaan.stami.ac.id/repository/free-minecraft-pe-server_GM479516143.pdf
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • https://www.bbc.com/news/world-asia-china-20212021
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002acc.bin
e9bb0a1d20d17784432d9b2cc239467eb84aa57c6f88bf6d6c0afdcbfca0a96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACC 22444 bytes
font_01_sfnt_off00005cdc.bin
03cae80738042903ed7303e5923c2b1ca7393d04b72c6adefe1e53c55c9a8aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 17752 bytes

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