Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9a78e6b59250b0…

MALICIOUS

PDF

136.0 KB Created: 2021-07-03 12:44:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 81b11328de33109be94ed1de04cfd5f1 SHA-1: 806cb23803c9568f36b26977a5a7eee3043e90a4 SHA-256: bb9a78e6b59250b0757184ea4cffa66ae5c0be0dc648d3ef87aa3abdfa27569d
122 Risk Score

Malware Insights

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

The PDF file contains links to a known malicious redirector, disguised as a "free generator / game hack". The embedded URL, http://netcdn.tw/app/1094591345/how-much-pokemon-go-free-today-game-hack, is flagged as malicious. This suggests the document is part of a phishing or social engineering campaign designed to lead users to potentially harmful content or further malware. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0083

Heuristics 3

  • 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.
  • 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/1094591345/how-much-pokemon-go-free-today-game-hack In PDF document text