Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59f042fdebfdc4a…

MALICIOUS

PDF

29.5 KB Created: 2021-07-19 21:24:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa63889a9a4bedbf1763e23f75652792 SHA-1: 5843277f5fabbb3b936b621c4630aa33c1c37033 SHA-256: f59f042fdebfdc4a2aa23612b6bf37318d0bb4697cb69d080da074da2646c646
170 Risk Score

Malware Insights

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

The PDF document contains a lure for 'game hacks' and displays a fake CAPTCHA, aiming to trick users into clicking a malicious link. This link, http://netcdn.tw/app/431946152/how-to-hack-people-on-roblox-game-hack, is associated with known malicious redirector infrastructure. The overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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 http://netcdn.tw/app/431946152/how-to-hack-people-on-roblox-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_off00001fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAC 21820 bytes
SHA-256: eeb5f1ebce82644e50fd44d274c7e15fce1ad3f05b5ca0767b7e85c89a95139e
font_01_sfnt_off00004fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC7 18864 bytes
SHA-256: 3bb8a2dae3a1b4d991366e88f95c9aba70b3d869c0580506886643149285b4b1