Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a215336c96781bf…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 16:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 57ce9d16ebbc29a7872b42c0f48601d5 SHA-1: 6f685084da72a5fce1ba34729cb7fbd0a63583a6 SHA-256: 4a215336c96781bf82541fb472dd264d8584738f4e8686eb012daa746c32ad94
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirect URL is http://netcdn.tw/app/406889139/coin-master-hack-spins-and-coins-unlimited-free-download-game-hack. This indicates a social engineering attack designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt.

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-hack-spins-and-coins-unlimited-free-download-game-hack In PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-hacker-typer-script_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/tbc-roblox-free_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/hacks-de-chat-roblox_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-verification_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-use-tiktok-free_GM835599320.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-use-cheats-on-roblox_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/robux-free-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-deep-web_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_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
font_00_sfnt_off0000332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332B 23204 bytes
SHA-256: b6f4546e24eb3d8884ae102122aae38b752be5cedcf04afa8d870ba7c271f730
font_01_sfnt_off00006768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 19368 bytes
SHA-256: add0edf7dd0394884c443ca24fd48469f9919274a259a3af7eac1d2f3d12793d

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