Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ead14d732c5870f…

MALICIOUS

PDF

36.9 KB Created: 2021-05-17 08:54:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4002f2e2e8b000c3caae1b5556175dee SHA-1: 4f12c77edf7b28992477f46933a08d5f3da0de11 SHA-256: 2ead14d732c5870f9a43fd268d79e6f1ecfa1fe429b4cc23474f359dc35eeb9b
92 Risk Score

Malware Insights

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

The PDF document contains a lure for "free Roblox toy codes" and a "fake CAPTCHA" to trick users into clicking a link. This link, https://netcdn.xyz/app/431946152/free-roblox-toy-codes-2021-game-hack, is identified as a redirector to a malicious site. The document's structure and content suggest it's designed to exploit user curiosity for game-related items to facilitate initial access.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • 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.xyz/app/431946152/free-roblox-toy-codes-2021-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_off000033d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D1 24808 bytes
SHA-256: 789f9013410aae1bfde0aee7a377c9bea27c8f5fae23091a841991fb276428da
font_01_sfnt_off00006d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 18704 bytes
SHA-256: 310b0eb167ed5acb3e0393954d8d7f46b13cc3d4732db83d1204f458420b6348

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