Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8675aeb6b8c4d49…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 10:58:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 768add92f476cb99dbae0e18ae497c5b SHA-1: 645a12b0353dd4e321915b83eba3b7069ac701f0 SHA-256: e8675aeb6b8c4d4916e0aee1ef897a17d03a5f1d0efb345863474f7dce51e5d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains an embedded URI pointing to a potential executable download, disguised with gaming-related keywords like "Krnl Roblox" and "hack". The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button heuristic further supports the intent to trick the user into downloading a payload. The document body and numerous other URLs reinforce the theme of free game cheats and currency, a common lure for malware distribution.

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/431946152/krnl-roblox-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-a-gamepass-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-admin-hack-unpatched_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/tiktok-free-followers-instantly_GM835599320.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/seniac-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/ccv3-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hack-menu-script_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-fb_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
stream_002_off00002d44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D44 22368 bytes
SHA-256: 3577a02055b4351c129c7fe4584cbb29bc42df37b829ac56279e82082babf50e
font_01_sfnt_off00005ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE9 18484 bytes
SHA-256: 530f23baf8b24e144e223e8e9ecbf6edcf09f5c8bd0ed85b271ecbf965ed2964

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