Malicious PDF — malware analysis report

Static analysis result for SHA-256 235f5cebba056ba5…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 03:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 72b68f48734664b5fd91b923260ae7c2 SHA-1: c9cfc61eef4118a90daeaab4f0d36aa573574b90 SHA-256: 235f5cebba056ba5b82a73c0e12608200410a9cd1c43fca4f7f156260a14a981
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, which is designed to lure users into downloading potentially unwanted or malicious software. The document body and embedded URLs explicitly mention game hacks and free currency for popular games, indicating a social engineering tactic to entice clicks. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a phishing or malware distribution attempt.

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/easy-robux-today-com-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-shred-money-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-i-have-free-wifi_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/contrasea-de-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-python_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-a-roblox-server-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-your-own-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/kazok-roblox-hack_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_off00002e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E60 22164 bytes
SHA-256: 372aafaca7ec06c391ed677587772bad1390e2267de470112cb7a553dfd7a075
font_01_sfnt_off00005f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 19168 bytes
SHA-256: 4998178e01b6573bad71b3be76ca6238676106c6934825eb3913c5ce476b07d6

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