Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e897c4ef1d9f8e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 03:58:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aaf97d2eb2940b59f95ddd14937f6f1f SHA-1: b7df7c207305291028a38ae6c587cb8a30a929c2 SHA-256: e4e897c4ef1d9f8e629fadecba29aa5782af9bdefa474ac9bc78296351d48d85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-daily-spin-free-game-hack, which is flagged as a known malicious redirector. The document's structure and embedded links suggest an attempt to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-daily-spin-free-game-hack In PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/wyas-of-getting-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/roblox-guest-0-hack_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/best-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/roblox-free-robux-pastebin-javascript_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/win-free-robux-robux-robux-free-new-game-order-roblox_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/earn-free-robux-on-roblox_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_off00003305.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3305 23052 bytes
SHA-256: 215933bae7b8e57766bfcb2fc90e01ebd55321d0d7b60c358fba1acda7d7230c
font_01_sfnt_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 18596 bytes
SHA-256: 4bd887bddad3707660fa4e91161c1a16423faf42318738ff8904c415139aa447