Malicious PDF — malware analysis report

Static analysis result for SHA-256 332a89b5b01c84d8…

MALICIOUS

PDF

32.7 KB Created: 2021-07-20 07:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a4aef5d1d6146ad3b622269512ed430 SHA-1: 6b0db9af69cda4053ebc768eb12411eeae8e2ce3 SHA-256: 332a89b5b01c84d88a8ff89e37c62cef21ce9e2e7fda8e69c9d312b4adf93bc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious PDF files, disguised as game hacks and generators. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates these links point to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to download further malicious content, likely through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/can-you-play-minecraft-for-free-game-hack In PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-free-likes-on-tiktok_GM835599320.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_off00002b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B75 22516 bytes
SHA-256: 73ebc9f248997f8d855d7fde20da7425d344c03128ff5dac4ef6adf22e326364
font_01_sfnt_off00005d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5C 18420 bytes
SHA-256: 81bede04d90c080fa29d20db124f1531358f39ee91ce610139dedd08dc3401fc

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