Malicious PDF — malware analysis report

Static analysis result for SHA-256 206c5858cebe3efd…

MALICIOUS

PDF

33.6 KB Created: 2021-07-01 01:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dfce9967d1b9f79f3c57e874cd33b01d SHA-1: 873b427ed2f55644955c33168603ed8235e85b1d SHA-256: 206c5858cebe3efd1fd92ae6556e9ac1ee71cdbc2f37e06640197f65f7e42582
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-games-on-roblox-real-game-hack. The document body explicitly promotes a "Robux generator" and "game hack", indicating a social engineering lure to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-games-on-roblox-real-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-executor-2021-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/lua-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-roblox-on-windows-10-for-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/hack-app-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-jailbreak-hacking-apps_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/red-line-30-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-codes-2021-list_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-toolbox-hack_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_off00002b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B2C 22808 bytes
SHA-256: f020d02eefb5d644b0687ed33f627ef7a247fd3654787936d17a5a9598e19220
font_01_sfnt_off00005e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E88 19052 bytes
SHA-256: 56f4e65812c403ac511da7c683eb66c8172328fd08918d47063ad90a487708b4

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