Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa9dc164f5bb2ac…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 05:40:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 230697510bb9d76b3d8307eb3cd4cc93 SHA-1: aa24bc870794d470ee3ec5ffc3fe04a458795f52 SHA-256: 4fa9dc164f5bb2ac2846dfbf8d774a4ed8bb1c6cff66dc2de9490fbe4912f97f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings indicate that the document is designed to lure users into clicking these links, likely to download malware or engage in fraudulent activities. While no scripts were directly extracted, the embedded URLs and the nature of the lures suggest an attempt to exploit user interest in free in-game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-apk-facebook-login-game-hack In PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/robux-game-com_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/how-to-get-free-skins-on-coin-master_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
stream_003_off0000498a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498A 25972 bytes
SHA-256: d723e5365935fb08083ae6e6c09eb48ea68f2f9377ba4c3d8f0bc2589433a89b
font_01_sfnt_off0000853e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853E 18504 bytes
SHA-256: 09f845dbab102c2a44680f08ef0cb39b809a24ce37ab1af9b7c1c0a4ff52117a

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