Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ae5f2857888e30…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 07:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28e930633ca93f22138730397a0d96dd SHA-1: 6a0f55be9c9952bb4e9b75ba21c8247b01f30c29 SHA-256: b1ae5f2857888e307fcf443233e17d6f4cc6a70b52859c17793943bdec4334bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. These links are designed to trick users into visiting potentially harmful websites. The ML classifier also strongly indicated maliciousness.

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-2021-youtube-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/robux-computer-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-avoid-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/discord-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-ban-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-wallpaper_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/download-roblox-free-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/easy-ways-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-items-that-are-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-free-roblox-glitch-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pokemon-go-free-roam_GM1094591345.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_off00002c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C75 22516 bytes
SHA-256: 641d9bab6b048b2e70031c37e83ca9c98f0982267a5c13002f5f88515929b47a
font_01_sfnt_off00005ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 19384 bytes
SHA-256: 7f45d9fb96b29a7a7012a08b36c2af5c35e45941a4d2ce907b2a636e677c7ab4