Malicious PDF — malware analysis report

Static analysis result for SHA-256 1528d4764d21db74…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 04:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1569d067ed1eb2416f15943a50f7bfe8 SHA-1: d96719af6d585dfe8585e89fe43f887752139186 SHA-256: 1528d4764d21db74f3d3aebe62e551e5ca3fa9a1032d236e6d1120c065cd09e0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a call-to-action phrase, indicating an attempt to trick the user into downloading a payload. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'password-protected archive' lure suggests the downloaded content may be encrypted to evade initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/free-roblox-discord-webhooks-game-hack
    • https://library.uigm.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://library.uigm.ac.id/repository/free-coin_GM406889139.pdf
    • https://library.uigm.ac.id/repository/roblox-free-hat-obby_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-spin-coin-master-game_GM406889139.pdf
    • https://library.uigm.ac.id/repository/get-more-robux_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-roblox-username-and-password-login_GM431946152.pdf
    • https://library.uigm.ac.id/repository/roblox-tokyo-ghoul-bloody-nights-hack_GM431946152.pdf
    • https://library.uigm.ac.id/repository/blockate-roblox-auto-build-hack_GM431946152.pdf
    • https://library.uigm.ac.id/repository/hacks-for-roblox-dead-locked_GM431946152.pdf
    • https://library.uigm.ac.id/repository/get-anything-free-catalog-roblox_GM431946152.pdf
    • https://library.uigm.ac.id/repository/get-free-clothes-in-roblox_GM431946152.pdf
    • https://library.uigm.ac.id/repository/bux-life-free-robux_GM431946152.pdf
    • https://library.uigm.ac.id/repository/roblox-bee-swarm-simulator-hack-android_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-free-soins_GM406889139.pdf
    • https://library.uigm.ac.id/repository/roblox-hacks-assassin_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://library.uigm.ac.id/repository/free-robux-tool-download-works_GM431946152.pdf
    • https://library.uigm.ac.id/repository/dragon-ball-z-final-stand-hack-scripts-roblox_GM431946152.pdf
    • https://library.uigm.ac.id/repository/coin-master-free-stuff_GM406889139.pdf
    • https://library.uigm.ac.id/repository/free-robux-hackcome_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a81.bin
77e533c245636bd0a1495ddee8c7c9615fdb1fec43a979a2962115c0622a3115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A81 22060 bytes
font_01_sfnt_off00005bb2.bin
a7e93b8b935a39ad7a5bc1e9a6b57521515cd7bfb66756439e2a296b0ef7e8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 19648 bytes

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