Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a400f46098254e1…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 19:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df5669b27da4927da23099fbee20d860 SHA-1: 6a0500bb8459a4338827e8975b1afce50ec04d61 SHA-256: 2a400f46098254e17fc609a6ea58996a882e992431eee8d94b70a15b5715167c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary lure URL is http://netcdn.tw/app/431946152/robufree-club-free-robux-game-hack. This pattern is indicative of a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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/robufree-club-free-robux-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-free-white-hair_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-really-works_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-a-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hacks-for-roblox-gods-of-elements_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/como-tener-robux-gratis-sin-hacks-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-5-ways_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/can-pubg-uc-be-hacked_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hack-apk-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hack-enginesaa_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-roblox-accounts-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-roblox-for-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-printable-roblox-invitations_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/que-es-free-build-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-for-unboxing-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-games-that-actually-work_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_off0000306f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F 22676 bytes
SHA-256: 5870bd447ef63c0f549f7860d1fe30f5d069579a1d6fe96a10156afe5ea68698
font_01_sfnt_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 18788 bytes
SHA-256: 0bf7fe162dc2b82a8abc6ee84ef1d26234b6e8ff080543af04db104c10038f5d