Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e133f6b444cc8b2…

MALICIOUS

PDF

28.5 KB Created: 2021-07-20 18:55:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad23967bed353fc969af052b2058b3ae SHA-1: a4c9ac7798e1493f268bab60ca2237ae6195c654 SHA-256: 8e133f6b444cc8b2d31245a8e07b8dd229fcf21564a6da140d00b7f4d66f6780
130 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 redirector lure, specifically linking to a 'free generator / game hack' for Minecraft. This link, http://netcdn.tw/app/479516143/minecraft-free-online-game-hack, is identified as malicious infrastructure. The document body also contains similar text and URLs, reinforcing the lure. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest an attempt to trick the user into navigating to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

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/minecraft-free-online-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_off00002012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2012 21740 bytes
SHA-256: 476eaa5ecadc08b9637b076e69a619956d39fa3992e90e0da1fdb3478ffbe1d3
font_01_sfnt_off0000500c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x500C 17644 bytes
SHA-256: d3a8b3d8bd2249c6206e1557dca74d08ec9c3b58c2328dc4779a04ae87c22ca2

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