Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9be7ebe3070a394…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 22:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df165e910906c6597aaf2263eb514a19 SHA-1: ed054608f5875785f27a77df8912afa327bfaa79 SHA-256: c9be7ebe3070a3945ae2d19ba20d046b1bc4c3aa347d013833ac9fbd77bd7007
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting "free generators" and "game hacks" for popular games. The primary lure URL is https://netcdn.online/app/406889139/coin-master-free-spins-2021-haktuts-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful websites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-free-spins-2021-haktuts-game-hack In PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000518f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518F 26012 bytes
SHA-256: 94e9b74547fbf60cda73023fc47817ba3498af8d8ce41c2fd0ae5ac7973c28e6
font_01_sfnt_off00008de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 2928 bytes
SHA-256: 9f9429556154f58f51965d4607d75d12cc88cffeb51594c11f518038b5c3e096
font_02_sfnt_off00009802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9802 18600 bytes
SHA-256: 89773803d88a9f64dc5621ed6622458791426392b237d756dbefd16237d4c6e2

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