Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b604acaac5bbbe…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 04:52:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d46c32c79a7f635dc44f31711480301b SHA-1: bd48a59d3be170b67a1ecc4d5a2ca79cc2e4f2d6 SHA-256: a7b604acaac5bbbeac50696ef873bd0eccdd9c2f8358ed84c5f175af9ac53dde
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, designed to trick the user into clicking a link and downloading a malicious file. The embedded URL points to a resource that is likely a payload. 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-hack-ios-cydia-game-hack
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-java-code-free_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-free-computer-game_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-script-hacks_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/game-roblox-play-free_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/hacks-for-dragon-ball-ultimate-roblox_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-coin-master-hacks_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/hack-coin-master-apk-32-download_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-free-robux_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-btools-hack-script-2021_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-no-verification-no-email_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-tiktok-likes-app_GM835599320.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-coins-coin-master-haktuts_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-download-coin-master_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-roblox-royale-high-outfits_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c2.bin
d49bb4f553f7c3a19dd305cbbc57de2fd1910d610499a4ccbf99553c61931507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C2 26356 bytes
font_01_sfnt_off00008d0e.bin
41856436dc4259e871047791e35b2a1feda8aeac1d398377343d76b06430bca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 18656 bytes

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