Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4a220129a3686d…

MALICIOUS

PDF

36.8 KB Created: 2021-05-14 06:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2b5b18910b41436f878b0deecf83d85d SHA-1: 16541bbaef77d987e3322b840f587f4d07513a41 SHA-256: 9e4a220129a3686df3c4f4fe9ce40a649cdccae4ea05f5c5119cce3485f800fd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/free-spins-coin-master-unlimited-game-hack, is associated with this malicious activity. The document body also contains text and a call-to-action related to accessing a 'Coin Master Generator', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-unlimited-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
stream_003_off000031ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AD 26156 bytes
SHA-256: 04a016e7cad2aaf5f9252563ef390640f2a7c06ddf1eb56ebf9c6237a88b79b0
font_01_sfnt_off00006dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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