Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63ba5e2bab09951…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 17:53:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 600fd1d4268bb262c50ca2bb5af448cb SHA-1: e66a8fddb047a23a8fe1aebfedd1d24835859327 SHA-256: b63ba5e2bab09951f9090c34a5474694287a3f0af988a2d09bb21a1f097be7c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack'. The document body and embedded URLs reinforce this by mentioning game-related hacks and generators. The primary URL identified is a known malicious redirector, indicating the document's purpose is to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/479516143/how-to-make-a-minecraft-server-for-free-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-execute-code-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-cbro-hack-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/robux-giver-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-no-survey-2021-june_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-spiderman-outfit-on-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-bandit_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-gamepass-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-vehicle-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-hack-free-robux-no-downloading-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-play-online-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/play-free-games-online-without-downloading-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3260 23248 bytes
SHA-256: 83c2a3f0dd32f4acd113aedabab9716eb912205bad62be11dc250874e8bf84b0
font_01_sfnt_off000065fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 18448 bytes
SHA-256: b3df4715d3d10d222cd03830af22d55d1fd09053c89107a65193d49beb578ea8

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