Malicious PDF — malware analysis report

Static analysis result for SHA-256 207635cc44f2c2fd…

MALICIOUS

PDF

28.9 KB Created: 2021-07-20 05:56:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e119f2b79ee84587990bb92160a1cad7 SHA-1: 54cce4d47a71ea62c400fb823841961d56d1d79f SHA-256: 207635cc44f2c2fd514d82920ce1ec789523f1b1a4edcb469f5abe6168e631e1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that promote a 'Free Robux Generator' and a call-to-action button. The primary link, http://netcdn.tw/app/431946152/free-robux-group-game-hack, is flagged as a malicious redirector, indicating it likely leads to a malicious download or exploit. The document's structure and content strongly suggest a phishing or social engineering attempt to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0570

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/free-robux-group-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_off00001d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D01 22440 bytes
SHA-256: cef15110ef57cd6e0fb7b61628592ee1c0d582c64f532a9a5b317c0f77344991
font_01_sfnt_off00004ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF3 18376 bytes
SHA-256: 2a1b1194c9c7ba03f9173fc8227a1f433bf3cd1edeaa844f73d355bc692a0bd1

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