Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a03f82a5063e38…

MALICIOUS

PDF

39.0 KB Created: 2021-06-04 00:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e01aaefc6aad345b0cc6116defb137c0 SHA-1: ce83a874c5f3ad8a986b177843141f642bd620e2 SHA-256: b9a03f82a5063e3836bb014c69bcef810a7a7d31c554328493e5f2718a36fd38
170 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a prominent 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, designed to trick users into clicking a malicious link. This link, 'https://netcdn.online/app/431946152/easy-robux-hack-game-hack', is identified as a known malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0331

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/431946152/easy-robux-hack-game-hack In 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_004_off00003afa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AFA 25616 bytes
SHA-256: fa3cf591f9a3216e8095d696fff87038db93f6b2a8c45ee9bb0a0d430fd03ea4
font_01_sfnt_off00007668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 18428 bytes
SHA-256: 2bceebe5c1993dbcd4316f947943b347169ed843d74f7d3766fe916d90107923