Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ade77539848f064…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 11:57:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7d1a951c7926c6ac62c9f00e009401aa SHA-1: ce6c19b3f581a34961949e88cb75fe5eab3905f4 SHA-256: 8ade77539848f064e136fe84155811926bf741dacb52469dc613ac5f27e10028
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that promote free hacks and cheats for games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spain-game-hack, is likely a lure to download a payload. The ML classifier also flagged this PDF as malicious with high confidence.

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-free-spain-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacked-by-john-doe-roblox-prank_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-noob-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacker-cloths-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-run_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-coloring_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/4-million-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.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_off00003070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3070 23400 bytes
SHA-256: 4a9e1cd34f706d4eeb057b5195d05dc887461331697255ee9bd3a00d85222854
font_01_sfnt_off00006551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90