Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cfbc2f05b528dc…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 20:03:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7497d7c8d9d5e19217023e46f9169c57 SHA-1: 3083684b0e5874c6daee2c7c38940daf7ae400dd SHA-256: 17cfbc2f05b528dc7058a2c7372a8c1c01003d801985590c5e66c52d4e276467
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a visual call-to-action, strongly suggesting a lure for users to click on links related to free in-game currency or items. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of external URIs and the document's content indicate a phishing or malware distribution attempt.

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-rewards-free-spins-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-cheat-rs-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-make-roblox-dont-saw-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-free-vip-server_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_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 22836 bytes
SHA-256: 664c1ebe97ea3d299c8b150ca210f92428e936e11927413284a19e9e7c2a34f1
font_01_sfnt_off000062a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 18512 bytes
SHA-256: 6bc66a7c9124691c5dbe04e2c8d08202ba1ceeb7f14ff76ef8eff16a4b1fabf8

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