Malicious PDF — malware analysis report

Static analysis result for SHA-256 f511a339731c9cde…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 15:01:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8a597774fc21573d2562daaa9ea1b9d SHA-1: b86b4d199159a87855d91e2d96590942e74e4080 SHA-256: f511a339731c9cdecd45b8b4c0848eb951ec604213b882560730360ad1d38a71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free Robux, game hacks, or other popular online game-related content. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs indicate a malicious redirection workflow.

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.tw/app/431946152/free-robux-gift-card-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/all-of-the-hairs-that-are-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-22-02-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-how-to-get-unlimited-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/epic-mining-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/apocalypse-rising-hacks-roblox-crash_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-please_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
font_00_sfnt_off00002f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 22292 bytes
SHA-256: cd2673fb3908655f98e6b6a2b0670df5a6f0711fffc6fba46779ebb22b69453f
font_01_sfnt_off0000610e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 19112 bytes
SHA-256: 5d60391c622a458b14b8fa69ffb952c1d3cbb56e74fa158a34f16b9612198a82

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