Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b6c7ebc4d93a39…

MALICIOUS

PDF

38.8 KB Created: 2021-05-23 15:47:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f26465fb7b5fbc5b0aa97ab4446cb443 SHA-1: a3b4a8c3a63e64cd30e9347a0a6e8ff0ec5a2985 SHA-256: a3b6c7ebc4d93a39a889e3a708e5ec1a88eff3531dfe3adaa7cd9fcc5ef788ae
82 Risk Score

Malware Insights

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

The PDF document contains lures for free game currency and followers, combined with a high-severity heuristic indicating a browser installation lure. The embedded URL points to a suspicious domain, likely serving a malicious payload. Although no scripts were explicitly extracted, the ML classifier and heuristics strongly suggest a malicious intent to trick the user into downloading and executing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/835599320/buy-tiktok-followers-free-game-hack
    • http://dorfgaragethalwil.ch/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/tiktok-free-movie-hack_GM835599320.pdf
    • http://dorfgaragethalwil.ch/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f78.bin
185e14006f216bf8bdc22a8ca2bdfb68dc862d926180fd94c65d7039d95743e9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F78 26336 bytes
font_01_sfnt_off00006c0a.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 2940 bytes
font_02_sfnt_off0000761a.bin
961899ff1eb424bdaf12ead7fcaccf2d09ae623c60a9c1ffe8485e19a18d4dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 18232 bytes

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