Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ac457554b60fe7…

MALICIOUS

PDF

30.1 KB Created: 2021-07-22 01:53:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 273a517aa2678a494a0451b953e96063 SHA-1: dc69b20afac1a8724c98edfde7ba3c1d0efdea42 SHA-256: 53ac457554b60fe7f7651c3e32650daaf0f4e143295b5c2f470ffcd2b148e6ba
170 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. It also displays a fake CAPTCHA, attempting to trick the user into interacting with the document. The embedded URL is likely intended to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0573

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/479516143/minecraft-windows-10-free-with-java-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_off00001f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1B 22780 bytes
SHA-256: c3ccb280168ac42e414c59844282a9e77d5c05618c40de89234d105fef6f5910
font_01_sfnt_off000051d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D9 18972 bytes
SHA-256: ec0d7e7957d6d3ec4a312ebe7c12434b242d64f4f861d318395950ba1ef4cb73

Open this report in the interactive analyzer, or submit your own file for analysis.