Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a8127dac167ce2…

MALICIOUS

PDF

40.0 KB Created: 2021-05-10 11:48:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7641cefa3dc24a6f5225e7db8d3f61ed SHA-1: ef8728340482563355476e76760bc604659ff8b7 SHA-256: 20a8127dac167ce2ff6bde0fd0fd1a8608c6a90bc9a6b050646776f3f40449a4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link and document body text promoting "Roblox Arsenal Hacks Download" and a fake CAPTCHA lure. The embedded URL, https://netcdn.xyz/app/431946152/roblox-arsenal-hacks-download-game-hack, likely leads to a malicious payload or phishing page. The use of a fake CAPTCHA is a common social engineering tactic to trick users into executing further actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/roblox-arsenal-hacks-download-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B7 26248 bytes
SHA-256: 57b8a21b70be73a31ef1d09b56ae39f2ab364b004760538f53a147d004d74d4d
font_01_sfnt_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7972 18688 bytes
SHA-256: 3194e743087210276cc8ef30afa20718d77c17967e4a232ddce90cfa751f40c3

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