Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4157f938cf2ec4…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 12:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae2f17ad5674db3214cdbf64f8258fff SHA-1: 95d6ad6c3f57f9c4af937f3d07db7300a9615d46 SHA-256: 4c4157f938cf2ec4bcd5ced984408c5c633b69828dbb63d9a93c7977df779374
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering "free generators" or "game hacks" for popular games like Coin Master and Roblox. These links are flagged as malicious redirectors, indicating a phishing or scam attempt to lure users to potentially harmful sites. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into clicking malicious links.

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-free-spin-no-offers-game-hack In PDF document text
    • http://firesafetyservices.biz/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-online_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-minecraft-skins_GM479516143.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_off00004962.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4962 25848 bytes
SHA-256: a8ab807e1bb2ece724a93694d9bb9c35834bd2f13ed6703aabb4cf0487c22a61
font_01_sfnt_off00008481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 17884 bytes
SHA-256: eca834da90127d06b30cbbdb6bc39378e5aaec836d7f1468a5bfe601ae733219

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