Malicious PDF — malware analysis report

Static analysis result for SHA-256 747e79a857543a60…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 00:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ac588418819a0dc56821f0f0c463f61 SHA-1: 092c5d15fdee8017f46cb2c40ed8d49d609b2929 SHA-256: 747e79a857543a600634d395a16f8a3eceb4a4bea7e6ad304df9b752779de2d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The embedded URL and document body content reinforce this, indicating a phishing attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/406889139/coin-master-free-download-pc-game-hack In PDF document text
    • https://www.ruchya.com.tw/upload/files/pubg-uc-seller-pakistan_GM1330123889.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/to-to-hack-robux-using-script_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/jjsploit-v2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/roblox-how-to-hack-gears-online-rpg-using-cheats_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/hack-client-for-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-items-on-alo-roblox_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/rape-simulator_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-lvl-1-roblox-exploit_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
font_00_sfnt_off000032c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C1 23072 bytes
SHA-256: 615222c5b986ad3f1fc14f249ea5a396659fdbea2bc373195966974c3219ab74
font_01_sfnt_off000066d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 18732 bytes
SHA-256: c019ed8ec51aec11cfd4435d098065b50ba7db79618555f513e678a421f3226a

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