Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b36b157ea4067e…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 07:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: da454dbf0baa6d9811d679e64c18fe2a SHA-1: 0613a1cd00d3963048fa06917bd13c894fef9778 SHA-256: 91b36b157ea4067effc91db6ebc684e0c848daca59e19e996e37182ba2f225ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, directing users to malicious redirector URLs. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-tool-v1-9-download-free-pc-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-tool-v1-9-download-free-pc-game-hack In PDF document text
    • http://lib.icbc-indonesia.org//repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-100-robux-for-free_GM431946152.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
stream_003_off00004ae8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE8 25032 bytes
SHA-256: cc7de6848d96b3f5c860ca173f1a1984cda5c0c4d857e5c21dcf40d62047d171
font_01_sfnt_off00008386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 19016 bytes
SHA-256: 72463d413271541d222c1197f8f9a8edc1a249d3ebb9d07bd42a16f0c907e414

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