Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a05ce70f2eca35a…

MALICIOUS

PDF

33.3 KB Created: 2021-07-21 12:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 959af8a91f9fb2fe03b2bf0e36a96768 SHA-1: 6c8fb1985f9561a1fde4a4ba493d09d05ae7cf73 SHA-256: 0a05ce70f2eca35a6f2a50f6ce899f33273b4f7b79663c4fad99d121a5beec89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-free-no-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/minecraft-free-no-download-game-hack In PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-free-download_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_off00002d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D02 22892 bytes
SHA-256: 89e7ef7663741aab858f65cc7ee334da2ba79cee8ac592844d892185c716ff74
font_01_sfnt_off00006057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 18292 bytes
SHA-256: 2f8f6932c6a5471fcd86ac874366aa199bea0908b5b9fba5acbbd4822a363b64

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