Malicious PDF — malware analysis report

Static analysis result for SHA-256 915731ea2c15ebef…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 10:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1734808b4c9e1409e419fadd4d51b97a SHA-1: c063daae609e8cdcf3caa6a22d472346216cf0b6 SHA-256: 915731ea2c15ebef69f6a03e30e777397452a82230059a07b68a98d7e6b7cb78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that lead to known malicious redirectors and sites offering game-related cheats and hacks. The primary link directs users to a "coin master free spins and coins" generator, indicating a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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-spins-and-coins-today-gift-reward-game-hack In PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/no-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.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_off00004920.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4920 24672 bytes
SHA-256: b46b362bc4095c8223ec0280e94cc0ec39b238b0eaed45a59329d7613f9fea48
font_01_sfnt_off000081d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D1 18404 bytes
SHA-256: 20323906fae34ef48fb3028b175607ed26afea8233a7a83525bcd6516f32abbb

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