Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19328fbca864f1c…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 14:39:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1c6b4a2cb4be28e11a2d4ea4b12e3dcf SHA-1: 712c9d41f7202c04c0f3dcd86733835d007da8af SHA-256: c19328fbca864f1c07eccf2a60a78fc6f2ee9af4f7f205d0417c54f55ead48c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious. 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-village-3-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-and-coins-2021_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_off000046f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F7 25792 bytes
SHA-256: cd5caf4eeec68a14857d70dd6d5f6ffa2d2332488e4a3db13015533d3a5b4e23
font_01_sfnt_off0000804b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804B 18216 bytes
SHA-256: e4b3d80eb6ba556054a8e812f3974da6467218e1eebf61316c05bc87faaf3273

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