Malicious PDF — malware analysis report

Static analysis result for SHA-256 33df5c712dee0f88…

MALICIOUS

PDF

27.2 KB Created: 2021-07-04 02:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65ab2ac93e073abec96504ae5a9cf600 SHA-1: d9f9a32a6376a50212bcab574c3009f1754bd63c SHA-256: 33df5c712dee0f8865f46a171f5486e10e4f3e11d824c1d0fdf73617da038982
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that impersonate a 'Roblox Adopt Me Hack' and 'Robux Generator' to trick users into clicking a malicious URL. The primary link, http://netcdn.tw/app/431946152/roblox-adopt-me-hack-game-hack, is identified as a known malicious redirector, indicating a phishing or malware distribution attempt. The document's structure and content strongly suggest a social engineering lure to facilitate initial compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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/431946152/roblox-adopt-me-hack-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_off0000172c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172C 21332 bytes
SHA-256: 0461c725e0e1d2f38f84be435257cb848e05fe1168b495cc30f68d8a018b292e
font_01_sfnt_off000045ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45AC 19308 bytes
SHA-256: 1d6d529828a603e65e14b6285156acac3d11e3a25e7a00ad8dd7aee01cb73554

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