Malicious PDF — malware analysis report

Static analysis result for SHA-256 62475af9b9739ec4…

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 09:12:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44ab92011d2935aac79a015067c1ea1f SHA-1: a296e26f14b77da858e5ee4245dcbcb44cb0b548 SHA-256: 62475af9b9739ec4d9780f08403f36ca23ca0ab5fed7ac79b7923d1d94913ecc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector domains, specifically promoting 'game hacks' and 'free generators' for popular games like Roblox. These links, such as 'https://netcdn.tw/app/431946152/unjailbreak-hack-roblox-game-hack', are indicative of a lure to download potentially malicious content or engage in phishing. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/unjailbreak-hack-roblox-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-best_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-minecraft-svg-cutting-files_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_004_off00005182.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5182 24836 bytes
SHA-256: 9d6685a268bc27f065cf2eaaeeb6fe540ebb5733fad62a8dc37a5a4337706d4f
font_01_sfnt_off0000897a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897A 18676 bytes
SHA-256: eaec5a0c16fdb38ce55a516a23ea71e49bdbb217443f45daef0c5f6d7846020c