Malicious PDF — malware analysis report

Static analysis result for SHA-256 729bdee63eab6d55…

MALICIOUS

PDF

36.6 KB Created: 2021-05-22 06:38:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7be5972b25e00b65972493fd80ff1289 SHA-1: 7f548c0bf43731e01562bb09b2a42c3c32c57179 SHA-256: 729bdee63eab6d559e6cf0b5202ebf320aaeca1d05404bcb360652f2502ee405
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically a site offering 'free college textbooks' and 'game hacks'. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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 https://netcdn.xyz/app/835599320/free-college-textbooks-tiktok-game-hack In PDF document text
    • http://pdia.de/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://pdia.de/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://pdia.de/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/roblox-sued_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
stream_002_off000031d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D3 26720 bytes
SHA-256: a05292d8cd89d4cd8cc41fd81b865391ecdc456943b24103de6d349e6afe92d2
font_01_sfnt_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 18184 bytes
SHA-256: c51aa8ed87b8ee8755a1ecd789814fb67703fc10c946440f5ae6e88abb0f8eda

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