Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9adc6504a2d2f69…

MALICIOUS

PDF

35.8 KB Created: 2021-06-26 19:14:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47413938bc6c1323ef89da4fc0ee7bca SHA-1: a3ff8fedc4b398cf85f917e0150539879cef9daa SHA-256: e9adc6504a2d2f699a5140aae1e9eb4d01b148e49590ef42024015f3265ce499
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and document body text that explicitly promote 'free Robux' and 'game hacks', directing users to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the heuristics indicate it's designed as a lure to a malicious site. The primary IOC is the malicious redirector URL.

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/youtube-how-to-get-free-robux-2021-game-hack In PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/building-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-do-you-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/tai-roblox-hack-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/javascript-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/cheats-for-super-power-training-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-case-clicker-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-studio-online-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-hack-roblox-top-model-points_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-streets-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-cheat-engine-2021-no-virus_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
stream_002_off00003133.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3133 23204 bytes
SHA-256: ff037c1e27833c4b4a96a9ba86dcd702d9c0ebf90d79a5f83a65a22bedc9611e
font_01_sfnt_off0000657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 19548 bytes
SHA-256: 852458bcaf5dd26557e693c90c7b40ff8ae0bf08d66d763aa8596865fa55b2d2

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