Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc463ed4dcb56bd…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 02:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a0fae2ee6413552440e52c7e76030125 SHA-1: a0878ba281ea7b099aa22335792e4aa70e7aed06 SHA-256: afc463ed4dcb56bd5bade91302095077de52570f090ba2d76dc4e64c9c08705e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as malicious redirectors, specifically targeting users with lures for game hacks and free currency. The primary redirector URL is https://netcdn.xyz/app/431946152/robuxy-com-free-robux-game-hack, which is designed to lead users to potentially harmful content. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/robuxy-com-free-robux-game-hack In PDF document text
    • http://ambingenieria.com/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-pe-hack-client_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_off000048f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F0 27784 bytes
SHA-256: 0a58de3424fd2d7a94be03f0438c276caeeb3d1f0a95e6e4c5bb3680bbd7dab0
font_01_sfnt_off000089b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 18452 bytes
SHA-256: 502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18

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