Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38c33b82fa26e66…

MALICIOUS

PDF

28.4 KB Created: 2021-07-21 11:52:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8b46edbda07fd88f35e562dff7d58845 SHA-1: 29963e4144a3a1e3ef2417074dd4899872aeb047 SHA-256: b38c33b82fa26e666f470e540cfb7949e7b7d193b45dd74822fbee9ea76eaa8c
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 malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL 'http://netcdn.tw/app/479516143/can-i-get-minecraft-for-free-game-hack' is identified as malicious infrastructure. The document body also contains similar lures and the call-to-action phrase 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the social engineering aspect.

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/can-i-get-minecraft-for-free-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_off000020ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EE 21284 bytes
SHA-256: 5da2e610f1924ae9dd78bc0633d4df04fe4b48280f81680d90f6ba416130e428
font_01_sfnt_off00004f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F17 17712 bytes
SHA-256: e4c5326dba6bbe04ecfe42fb3576534f1bedf9d9a77461a4c126bff948161748