Malicious PDF — malware analysis report

Static analysis result for SHA-256 235007e39c0ccf6a…

MALICIOUS

PDF

35.1 KB Created: 2021-05-10 11:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e7c4a60a3fb84cf6687d6c5315444f76 SHA-1: 43b5f26176d6ed187acec9eb2321a7a9cb7f5359 SHA-256: 235007e39c0ccf6a97348bef5b83223e56fde44e9e162880558fb481c1157e58
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a social-engineering lure related to a 'Roblox Controversy Game Hack' and directs users to a suspicious URL. This tactic, combined with the heuristic indicating a browser extension/update installation lure, suggests an attempt to trick the user into downloading and executing a malicious payload. No scripts were extracted, limiting the ability to determine the exact execution chain.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/431946152/roblox-controversy-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00002f70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F70 24524 bytes
SHA-256: d2930dd512c1f5c8ad10b93a38f67eb6ede9719e2f5261ed7f6a2175892e520f
font_01_sfnt_off000067e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 18180 bytes
SHA-256: 9e52ffd308ee5a3d26e24f101e73c94148b865116d88f3f50f946170f5e81340

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