Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e10a5f90e6fa73…

MALICIOUS

PDF

43.6 KB Created: 2021-06-09 03:21:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 476f709b4830c506a532467d242cbe05 SHA-1: 1217a4b04b34d4aa62a7552843814135c4f0acfa SHA-256: b5e10a5f90e6fa73bf9aeb1949094ee6d678cde07aa346b331afe174c769f5bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and extracted URLs reinforce this, indicating a social engineering attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be a malicious link embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-costumes-free-game-hack In PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/tiktok-free-mode_GM835599320.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-account-hack-v3_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/de-roblox-hack-pw_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/speed-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-robux-without-verifying-2021_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_off00004f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7F 24428 bytes
SHA-256: 0add7726281e2dc0d75c16f7af08188d01ded506303f1374eee767eab0899a26
font_01_sfnt_off0000872f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872F 18452 bytes
SHA-256: 806b349a48c4f6accfe64303422418417732100d3527b3adc1b75cd57846e3ba

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