Malicious PDF — malware analysis report

Static analysis result for SHA-256 031a4185dde1104c…

MALICIOUS

PDF

47.1 KB Created: 2021-04-30 09:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d4a9fe9dc28770b1331eacf148db2237 SHA-1: 24e50141737b44486b568b710f0af4ab1a43f015 SHA-256: 031a4185dde1104c7c175eef56c7037f577a67be5015a887fca5efe322031359
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for 'SE_LOLBIN_RUN_COMMAND' indicating the potential execution of commands. The document body, though heavily obfuscated, suggests a lure related to game cheats and hacks, specifically for Roblox. The primary malicious URL identified is https://netcdn.xyz/app/431946152/cheat-ninja-legends-roblox-game-hack, which likely hosts a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/431946152/cheat-ninja-legends-roblox-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/guess-that-song-cheat-list-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-and-tix-button-game.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-games-that-you-can-play-online-for-free.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/pastebin-robux-hack-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-app-for-ipad.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/no-clip-hack-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/no-survey-anti-bots-allowed-robux-hacker.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/best-cheat-engine-for-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-roblox-passwords-with-cmd.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-on-ipad-roblox.pdfIn PDF document text
    • https://freerobux.cyouIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004226.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4226 38492 bytes
SHA-256: ec648b115c15f5ddf617b60578805aa866cf015fd64dcc27f2b6e7961ca49c48
font_01_sfnt_off0000948a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948A 19052 bytes
SHA-256: ed5edf942b7e5261fd17dfd4f702de56c27638caca0a3830d58b612e9ea3952e

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