Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4eace95bccbf47…

MALICIOUS

PDF

44.9 KB Created: 2021-05-18 04:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a28e58754de01ba3c60a87855902f3c SHA-1: 881e176e549f86c99db2bd4d3983214cb65d01f0 SHA-256: cc4eace95bccbf472a40b69aaa0c4e5d3b1b033da499144445f230436a943059
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically advertising game hacks and free spins. The document body and embedded links suggest a lure to trick users into downloading potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/legitimate-coin-master-free-spins-apk-game-hack In PDF document text
    • http://uo-nn.ru/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004760.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4760 24880 bytes
SHA-256: b459566d358abe507faa14c91bdc45a07d82ea9cfba63ed542406a9f07974605
font_01_sfnt_off00008109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8109 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C32 18604 bytes
SHA-256: 744d2d183457972f47b0db91107cea2f4bf33f1c8b8b46bcb558057de1b31a04

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