Malicious PDF — malware analysis report

Static analysis result for SHA-256 559752c90fe0b4c1…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 13:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 544d2f001bbc64ace70d772f9a39362f SHA-1: bcb22f6d122beee6116ef2bc3f0f823de9d0477e SHA-256: 559752c90fe0b4c11c02c6a44be0a18ec4e601ebfb4e519ebc2e2efb03a0dea5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. The document contains numerous embedded URLs pointing to redirectors and potentially malicious content, including the primary redirector http://netcdn.tw/app/431946152/roblox-hack-tool-game-hack. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to lead users to 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/roblox-hack-tool-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-rememendem-toys-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-creepy-elevator-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/games-to-get-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-robux-trade-m-programme-promocom_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/fe-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-working-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/guuudd-info-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F70 22952 bytes
SHA-256: 1918e1d5031cc4b9e52f6e157bdc8b37845304e8d81399dfcedb337ae36154b1
font_01_sfnt_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 18656 bytes
SHA-256: e8d3b80f1b6f2c9c2bf73e7970ea5f3b8003eca05e06d1d82551611c8be56651

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