Malicious PDF — malware analysis report

Static analysis result for SHA-256 a576c63d3486aeba…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 16:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 540e0c52ba42e44131e5a11cf82e3d4e SHA-1: dad10f5df4d3a38ba925024ff80ee8c805b80519 SHA-256: a576c63d3486aebad1f9911964d1fe51d382c05ec413f92ae1bf53b1cd87ebfe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, identified as malicious redirectors. The document body and heuristics indicate a lure for users to click these links, likely to download further malware or be redirected to phishing sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-hack-without-verification-game-hack In PDF document text
    • https://tckontrola.hr/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-hacks-wurst_GM479516143.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_off00004981.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 24888 bytes
SHA-256: ea633850c37d8e0415ff6aaa7fbbfb91b3d9853354d1a1251aad6776480f4873
font_01_sfnt_off0000829d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 18356 bytes
SHA-256: dc73d1475286564dbbcfd7fe1f785306788ee44bec01666c46f1ad38f7aa2791

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