Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d328b73769f2f3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 12:10:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 71c1ce278c65919ac972cd5578870b89 SHA-1: 45550505e317036ed83e859f55d541cbbed5fbb6 SHA-256: 03d328b73769f2f3abcfe936cd61e01c2eae66227415a0d27ad88b6de0d47b70
160 Risk Score

Malware Insights

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

The PDF contains lures for game hacks and generators, with embedded links pointing to known malicious redirector infrastructure. The primary URL, http://netcdn.tw/app/431946152/free-roblox-generator-for-roblox-game-hack, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for further exploitation or phishing.

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-roblox-generator-for-roblox-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-auto-piano-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-gift-card-codes-list-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-play-alone-esrly-acces-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-millions-of-robux-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/speed-hack-download-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-stream_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_off00003160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3160 22132 bytes
SHA-256: 2d6d979b66f659c558f56ec0f778cdef229c12b5c37d89e700377d7318a5bd28
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 18752 bytes
SHA-256: 7a858cebcbb43583261fc6928f7757faac90e9e6cc2d406a534a148fe309e18e

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