Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa032fa01ecce98…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 23:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a3153327627c4a16e50bc5e1ef36dd4 SHA-1: 06ffdbe3e597e3670e4c451134f6930b7fc0d536 SHA-256: 3fa032fa01ecce987e1210e75a5ab2a81463b3051deae62b0b90df8b5291cf55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free Robux Gift Card Codes" and "game hacks". The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/431946152/free-robux-gift-card-codes-game-hack In PDF document text
    • http://kukuck.de/images/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/hack-coin-master-apk-32-download_GM406889139.pdfIn 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_off000032f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F6 24684 bytes
SHA-256: 104099748ec317feb0757cd10ce4be5c2c1f239c106133ad3ddf20d014094218
font_01_sfnt_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 18640 bytes
SHA-256: ab9c735b01157041a26a1754a1ceb43d7e93b9bb6de5cba43436a791952d9cfa

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