Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a89fe9715452539…

MALICIOUS

PDF

36.9 KB Created: 2021-05-14 03:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 97c9f2fb3fdab7db3b1b89576b1d1217 SHA-1: 31056e801c10ee0d3e4d6a07ce49308f4cf0c60c SHA-256: 9a89fe9715452539f5b8561abd8800d49b89c979dfb5ded32846fe5996e210db
170 Risk Score

Malware Insights

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

The PDF contains a lure for a "free generator" and displays a fake CAPTCHA, aiming to trick the user into clicking a malicious link. This link, https://netcdn.xyz/app/431946152/how-to-free-robux-game-hack, is associated with malicious redirector infrastructure. The document's structure and lures suggest it's intended as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.xyz/app/431946152/how-to-free-robux-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
font_00_sfnt_off000031af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AF 27296 bytes
SHA-256: 222189a455bdecb56e4525e6c9dfccf8d582a22c6e734aeb69c277485030a82b
font_01_sfnt_off00006f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 18180 bytes
SHA-256: b892188b0545c7b74f3e706ff7289536b8608c6e24b963a14dda60cd6c46c02c