Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba9b9220c0d4295…

MALICIOUS

PDF

39.3 KB Created: 2021-05-10 10:04:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 950a0642cbbc370c4e9b2b6b9af37aa7 SHA-1: 1391c6596a15d100c851ea405e50eba880a3cf6f SHA-256: eba9b9220c0d4295047d70df8bdbe6f3c0df4f56cc1d9d3881c1356bb3f07ced
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent lure for 'Free Robux Hack No Human Verification' and a call to action to access a Roblox generator. It links to a suspicious URL, https://netcdn.xyz/app/431946152/free-robux-hack-no-human-verification-game-hack, which is flagged as a redirector for game hacks. The presence of a fake CAPTCHA heuristic further supports the intent to deceive users into interacting with the malicious link, likely leading to a second-stage download or scam.

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/free-robux-hack-no-human-verification-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
font_00_sfnt_off0000318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318D 24400 bytes
SHA-256: 01ac0c4d98b1f340bf05be0e7d828e9bb7bd14af3388b0e92e43dedf3346ed96
font_01_sfnt_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000075cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 19028 bytes
SHA-256: 768a4e91d7c3975acc2b79a699acb909e0f8bbf2befa87684aa1b4f9aecc197e

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