Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83652339ea9960c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 06:15:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aebfa9ed996d31feebe9c81a1a0e1e27 SHA-1: 2a7ff02bc983f1c39576ff7c8f03f99ddad50e39 SHA-256: c83652339ea9960c7ef844efb0386aa75f50eee7af1b034bb1c18a9583c98558
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL, 'https://netcdn.xyz/app/431946152/roblox-free-no-download-game-hack', is flagged as malicious. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a 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/431946152/roblox-free-no-download-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/link-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.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_off00004806.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4806 25576 bytes
SHA-256: bb40fd033f52f5968d6aeacece4ec61c987b916ead2ca3363e27653058204283
font_01_sfnt_off0000833b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833B 18680 bytes
SHA-256: 594f974c71c1e9b72d2021421f5ea77f9f9dd5e689ba96d2b51dc4efe6f30b0b

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