Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a234e33fddb5f5…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 06:44:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0c9b721ddba7e545af25321148ec5f8 SHA-1: a5308b1c35f6d876dcfb4bcfe7335238147c1421 SHA-256: b4a234e33fddb5f5726ff9fec856edb8aa625d3337a692ea06b48a8f25c85d3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a site offering 'free Robux hacks', a common lure for scams and malware. The heuristic firings confirm the presence of malicious redirector links and a general ML classification of maliciousness. While no scripts were extracted, the document body and heuristics strongly indicate a phishing or scam attempt designed to trick users into visiting malicious sites.

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.co/app/431946152/free-robux-hack-november-2021-game-hack In PDF document text
    • https://www.jjpremiers.com/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/trustworthy-free-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-roblox-clothes-mobile_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/tiktok-free-likes-and-views_GM835599320.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_off0000315e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315E 22132 bytes
SHA-256: 9bf26156338d0157936b3b22ab3dc4934f4339431b0e1d85512c4449cb9f436b
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 19664 bytes
SHA-256: 971e507e7cf305657bd4853fc659cda28a0141764e4e80dcab1b0e844df86622

Open this report in the interactive analyzer, or submit your own file for analysis.