Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b00b47bcdd3c54…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 19:39:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3558b60e63c2ece87f972b88cdb4f8b7 SHA-1: 10c250490013f4323d9ba02e4bc8e95820ebf096 SHA-256: 99b00b47bcdd3c54358fb4b23db28c46e8474d9d10d92ca353f98d9540a0f876
160 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 free spin generators for popular mobile games. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The embedded URLs are designed to lure users into clicking, likely leading to further malware downloads or phishing attempts.

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-game-hack In PDF document text
    • http://wwic.wales/uploads/files/files/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-coin-master-app_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_off00004a68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A68 24752 bytes
SHA-256: b8a44472874be5f2e6b84f81690f6b19cadb701e4321d83a67caacdb2bcb0cb1
font_01_sfnt_off000082c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C4 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2