Malicious PDF — malware analysis report

Static analysis result for SHA-256 598ca24a0f75a2d2…

MALICIOUS

PDF

28.8 KB Created: 2021-07-19 07:21:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0f7b143aa1c4463932a27492760c903 SHA-1: e19c98f8ed2c32f4cf317de28ddf1d61e58d86b8 SHA-256: 598ca24a0f75a2d20b3803ed5046c63018db8f3c840534cb46b25304bc3e1a0b
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a redirector link, specifically advertising a 'free generator / game hack'. The embedded URL, http://netcdn.tw/app/479516143/best-free-minecraft-server-hosting-game-hack, is known malicious infrastructure. The document body and PDF facts indicate this is a lure to trick users into clicking the malicious link, likely to download further malware or lead them to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0373

Heuristics 4

  • 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.
  • 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/best-free-minecraft-server-hosting-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_off00001f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F66 21652 bytes
SHA-256: e7c4ff8ac32455463fc1c25b90cd07d1d81fcb53f4fbc6071f66a68537fdcf60
font_01_sfnt_off00004ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC2 18328 bytes
SHA-256: 0b2d28431e5234c57104fb234e5f183f246f5a4819408a3d571d7ab08b18c1e5

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