Malicious PDF — malware analysis report

Static analysis result for SHA-256 5551aa2ca9a3b524…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 17:11:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c47ad10d6897a8334afd31a51da62905 SHA-1: c7d68b0230fccb6f21f4090d41018c64ed253a38 SHA-256: 5551aa2ca9a3b524d52085ab7024b731f98df5c28a3dec07582f6f5c1cff8c1e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/835599320/tiktok-free-upload-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious content or downloads.

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/835599320/tiktok-free-upload-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-r-cheats-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-money-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheat-engine-table-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/earn-free-robux-game_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-fucking-get-free-robux-2021-real-omg_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-pumpkin-stencil_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cool-free-roblox-girls-hair_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-medieval-hood_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/phantom-forces-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-app-that-sends-code-to-your-email_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-admin-how-spawn-overseer_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_off00003270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3270 22216 bytes
SHA-256: 01ca8dbbd1e6a184c39e06e4a68b15b075e86bed65ed46cae0820f20562aac4a
font_01_sfnt_off000063cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 18580 bytes
SHA-256: 44f234fe15c9fa1920fe65da43cafd1641f4eabbfeb9d9e509e359e86483e619

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