Malicious PDF — malware analysis report

Static analysis result for SHA-256 1729c6ecdf242c22…

MALICIOUS

PDF

38.0 KB Created: 2021-05-20 04:27:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1521824e30547e0292e10bedbf82cc8 SHA-1: 2075c28d9bdea4b6ef04c58021911c1ba7bd3682 SHA-256: 1729c6ecdf242c226fa6f6d8f9dfd64ee773398b1c06de9f305b5b3b5d858dab
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game items. The embedded URLs, such as 'https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-iphone-2021-game-hack', are designed to lead users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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/479516143/how-to-get-minecraft-for-free-on-iphone-2021-game-hack In PDF document text
    • http://cleansui.com.tw/image/data/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/pubg-uc-or-ag_GM1330123889.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/pokemon-go-free-and-apple-watch_GM1094591345.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B95 24688 bytes
SHA-256: 269319ca7831176bcc8c05b1ed8c9db6163213c62de2e62c01ff425b565cb470

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