Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba784c802a32635…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 11:54:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e34dd6f5d1d28a9e02751d805187dc3e SHA-1: 263c1a4bb77700904e6be6a29d5bf2750af1ee70 SHA-256: cba784c802a326351236b7757e14216214529e7abe971d870a2e129cd4eda0aa
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" or "hacks" for popular games. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual download button lure suggest a phishing or scam attempt. The primary malicious action observed is redirection 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/479516143/minecraft-free-app-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/pastebin-robux-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/i-got-hacked-playing-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hacks-for-roblox-tycoon-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/gamekit-free-800-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/auto-kill-hack-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-no-scams-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-by-playing-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-speed-hack-on-roblox-mac-os-x_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hacker-website-prank-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-attacks-coin-master_GM406889139.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_off00002e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E04 22504 bytes
SHA-256: 1f3853873d91f06898a35d2c3e4e5e50d9e63e177a179b692ad8c01f7e3967c2
font_01_sfnt_off00005e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E90 18032 bytes
SHA-256: 0bc784eeec948ca4ce2f9a88fe31ce1ecf50bbbd59e26de113fcc7fd92f66c07

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