Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b804ccc284f0bc…

MALICIOUS

PDF

36.7 KB Created: 2021-05-11 15:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c53f58ca451aed69886a0f742bacfd40 SHA-1: 1a508ed38564bc5d7b8fe65747cb5b02ad630b2b SHA-256: a2b804ccc284f0bc2202c34d90b359ad36c6f4873344e2413320ed3bcc5dcd3e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "free generator / game hack" for Minecraft. The document body also contains similar calls to action and the same malicious URL. This indicates a phishing or scam attempt designed to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/479516143/get-minecraft-windows-10-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_off00003518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3518 24428 bytes
SHA-256: 32b907f907d9381ec5313d8efb3f56827448cb3161f862d36e0d1103c593dca2
font_01_sfnt_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 18524 bytes
SHA-256: afbe33bac95265c6f2b043ad9a50b9956be980e83b0cfba0a93a34130b59281e

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