Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55d1bdcc3c42db0…

MALICIOUS

PDF

33.9 KB Created: 2021-07-20 14:25:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29cf8073aa6e6296a39e59b86a35e89a SHA-1: d15d703ff781649bdba3fd642e0187cca288e4e6 SHA-256: c55d1bdcc3c42db05f9c23e0cf2dd950de73e29b27e400923f05c3695469226f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The document body text and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/479516143/free-minecraft-server-game-hack In PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.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_off00003085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3085 23012 bytes
SHA-256: c65abbfb1d0d6c703e89c515e7934e1e9b63e4ba4a19c860fb7bf664e390bc44
font_01_sfnt_off00006458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 17684 bytes
SHA-256: 971ebce79d03a5424fa8491ae570b1f65fe2ad06e00737069ab54be99501e2e8

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