Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c3b5d9947c1855…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 08:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 97e21aed2d17a4363151779ac83a677d SHA-1: f7053959ddad118082df68db078fb7a9645a7db4 SHA-256: 27c3b5d9947c185512ad5400a1f93dbce0276377687d545a742f4618100d633e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including one at http://netcdn.tw/app/406889139/hackear-coin-master-sin-root-game-hack, which is likely a lure for downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a call-to-action heuristic further supports a malicious intent to trick users into downloading a payload. No scripts were extracted, but the overall structure and embedded URLs suggest 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/hackear-coin-master-sin-root-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hacker-sur-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-stuff-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-cat-tail_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hacks-counter-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/nerf-fps-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/password-generator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/new-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-and-bc-generator_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-tower-battles-cheats_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/info-de-el-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-jailbreak-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/best-hacking-websites-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-at-http-get-robux-eu5-net_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-match_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_off00003548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3548 22776 bytes
SHA-256: fef702de23e00e58f8f2589e88bb6423313edb2b9dff962d93a289443ce0ccce
font_01_sfnt_off00006865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6865 18004 bytes
SHA-256: 08624150e58758f406cd174736f937a82fb2a2167488774787474989852631aa

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