Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbcde3d834d8b0b…

MALICIOUS

PDF

36.7 KB Created: 2021-05-15 12:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b2e6e9786306aee184485f73dad1521c SHA-1: 0cb788a8a3a71e561e0d5c9ae83cee384cbeb939 SHA-256: dcbcde3d834d8b0b7bba1e9972dcab6742ead901d94c2170adecac205807acae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-2021-spin-link-game-hack, which is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/406889139/coin-master-free-2021-spin-link-game-hack In PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-coin-master-spins-2021_GM406889139.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/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-hack-no-human-verification_GM431946152.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/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-roblox-accounts-with-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-gift-card_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-prison-life-hack_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_off00004942.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4942 25588 bytes
SHA-256: 5e08cee89b06d9566b1c77277be712ca99ee6c2168df161d0e6b465609255354

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