Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81b521bfd45cdf…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 04:39:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: ffccb9b5bdebaa0ec9a474066a1b0aad SHA-1: c13d29e5d2ac388f4df829f2f65960293a1d1ac9 SHA-256: aa81b521bfd45cdf56d2b291c220447f30b4d81b56cee99863b2c0b5a806b2ea
160 Risk Score

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/roblox-account-hacking-program-game-hack In PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-roblox-hack-free-robux-generator-uirbx-club_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/mcpe-116_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-download-roblox-hacks_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_off0000312f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312F 22604 bytes
SHA-256: e55369e01688fee32f15cc3e909a7026447221da3da0b004c15c96461dda15ed
font_01_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 19432 bytes
SHA-256: f178decbb0020e705e393dcef60e7f3effa4dee8e0d7759cb7e1b78affc048eb