Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97c0a05166d4b4d…

MALICIOUS

PDF

37.8 KB Created: 2021-05-16 04:32:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9f0fd229db084548197bf95004a2ba42 SHA-1: acf9887e4668f34c168850970cdc1a94054e3aa5 SHA-256: b97c0a05166d4b4d777b139aea6a42892ab134afc6f304e180f6cf682925d96f
170 Risk Score

Malware Insights

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

This PDF document contains a lure for free game currency and displays a fake CAPTCHA to trick users into clicking a malicious link. The embedded URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack, is associated with known malicious redirector infrastructure. The document's structure and content suggest it is designed to facilitate initial access through social engineering, likely leading to a second-stage payload or scam.

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-get-free-robux-without-doing-anything-2021-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_off00003606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3606 25112 bytes
SHA-256: add6b55fd722e3bafd9483c4a259d63994195dae7a3eb9d3be17a7614db3cb09
font_01_sfnt_off00006dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 19804 bytes
SHA-256: 7de61e10f8b36a8651a25a8843179e8b1ecc4bebcf46d2f81f98618caa29dc1a