Malicious PDF — malware analysis report

Static analysis result for SHA-256 776065cbc6bf01d5…

MALICIOUS

PDF

36.4 KB Created: 2021-06-20 06:12:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb3e0fec8e757f9f01dda57cae9208b4 SHA-1: 44c01ed9ab0f1f4d3719d481970726c09ebecafd SHA-256: 776065cbc6bf01d5b9efc2863241acba9ac5f8a6fc4c70a9a30626b72579b1ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.co/app/431946152/robux-hack-no-survey-no-human-verification-2021-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially harmful content, likely as a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/robux-hack-no-survey-no-human-verification-2021-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/roblox-apk-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/2021-robux-profe-fro-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-bloxburg_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-use-impact-remastered-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off000034a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A0 22312 bytes
SHA-256: bacafe18148be081d78c9bcf5b78c496fae16d65f91c54f6bfab6a03dd2f3553
font_01_sfnt_off00006630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 20036 bytes
SHA-256: cf0524d1bea1ff9de490ee1869e9fc92c5f1ac4bba455e1b7af6d0e7c99bb03a

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