Malicious PDF — malware analysis report

Static analysis result for SHA-256 05519b1dc086c531…

MALICIOUS

PDF

39.0 KB Created: 2021-07-05 09:36:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b14b960dac18836e4d71e312a771c583 SHA-1: a9d931f6aff5b3d8cf0284249df6e16b719500f1 SHA-256: 05519b1dc086c531acd4a0d4a5cb4a39bf32efe05ed02b0ccad4d362b05ffc2d
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure related to a "Pokemon Go Free Bundle" and a link to a suspicious URL. The heuristic firings indicate this is a game hack redirect lure, and the ML classifier strongly suggests maliciousness. While no scripts were extracted, the presence of a malicious URL points to a likely attempt to download a second-stage payload or redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9118

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/pokemon-go-free-bundle-game-hack PDF link annotation

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