Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc36c094f9860e57…

MALICIOUS

PDF

47.8 KB Created: 2021-05-19 07:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d3c595dbc51b7a0f0e06a2fc1cb1b4b SHA-1: 848661380763c0e462b6a044347331af35814492 SHA-256: dc36c094f9860e57473f8f3e7daa0aab8564c31a09a8456af0bce2d6a7a32188
170 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack redirector lure, directing users to a malicious URL. It also displays a fake CAPTCHA, a common social engineering tactic to trick users into interacting with malicious content. The embedded URL is the primary indicator of compromise, likely leading to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0158

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/free-robux-generator-com-roblox-hack-game-hack In PDF document text
    • 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_off000036a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A8 24960 bytes
SHA-256: 6f9f313f9b639c8829f9b4c6ad8142a44deeda1b60f2f3f97564350c6f18144c
font_01_sfnt_off000070ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off00009889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 18852 bytes
SHA-256: 4f913a2277500713712aa6cd09c4e12b5f8093088fb24eab89a43b1b22929045

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