Malicious PDF — malware analysis report

Static analysis result for SHA-256 0455ac8bcefaef9f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 01:19:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7312a12cb799c54e84501d3590be467a SHA-1: b387849d0c6fa97998ca362475e6f22f477b05eb SHA-256: 0455ac8bcefaef9f260e1b56b6494bd9ce7668d0737ec2dd0673fe9c1bfb42fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-facebook-hack-game-hack, are identified as malicious redirectors. The document's structure and content strongly suggest it's designed to lead users to potentially harmful websites, likely for further exploitation or malware delivery.

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/406889139/coin-master-facebook-hack-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-safe-roblox-injector_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-free-drift-track-model_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/when-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/chocolateexe-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-with-hack-bar_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/assassin-roblox-codes-2021-october-free-exotic_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-robux-generator-hack-2021-zn-game-online_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-apocalypse-rising-hack-exploit_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-generate-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-how-to-create-a-group-for-free_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_off000032ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AB 23200 bytes
SHA-256: a132dbfdac08e50699b48a42d0bfd1abd2269be963877689715191b342715cd2
font_01_sfnt_off00006735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 18324 bytes
SHA-256: 6ad1846c5a228a809b9de1cefde13e0c6880a4115f839aceb456980284c5160f

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