Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc54eae4ebf7b58…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 11:32:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 504ab76b845fbc8554cbfaca48d4127f SHA-1: 8fef6f70288dacbf440ca8a85533b723d3445b80 SHA-256: 4cc54eae4ebf7b581e04fc815214d7bc1f63efefcaba193fcdfc8c1f3e051be4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free Robux and game hacks, directing users to a known malicious redirector. The embedded URL `http://netcdn.tw/app/431946152/hey-google-how-do-you-get-free-robux-game-hack` is identified as a malicious redirector, indicating a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering tactic to lead users to potentially harmful content.

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/hey-google-how-do-you-get-free-robux-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-straight-face_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/admin-hack-roblox-dowload_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-games-twitter-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-btool-command-without-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/nuebo-hack-de-robux-2021-atualizasion-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-on-roblox-no-scam-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-verifacation-or-scam-mobile_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_off00002e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E27 21908 bytes
SHA-256: c8a1e1cdff5f89a93c841b1a7e1ad90490ea0cc3e55298c4744898aa18a74c12
font_01_sfnt_off00005e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8D 19568 bytes
SHA-256: c947cb9e4153dfb2ea198cd701ec4d5f338e29feb7802fd2debd87897cec7901

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