Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f50e421fe385ead…

MALICIOUS

PDF

33.8 KB Created: 2021-07-08 12:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 34ac0bdfb682258a8d8c893269b676c1 SHA-1: 6e1c023a3c66255dbf214bb12781ead20a018e4b SHA-256: 8f50e421fe385eadef6166a0c17f6f7e0bcc29478c79c38c88e2f397cea6e95b
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link to a "free generator / game hack" lure, which is a common tactic for distributing malware or leading users to phishing sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous game-related URLs reinforces the lure. The primary IOC is the initial redirector URL, which likely serves as the entry point to the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-java-minecraft-free-game-hack PDF link annotation
    • http://www.ma-plast.hr/files/rbxcash-robux-free_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-stuff-on-roblox-with-inspect-element_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-arcane-adventures-cheat-engine-windows-10_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/admin-hack-any-game-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-skin-pro-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/tiktok-free-100-likes_GM835599320.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/youtube-free-robux-october-2021_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/http-bloxy-site-free-robux_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22356 bytes
SHA-256: 06e11960909d5cabe81a291eaac5723b2be32e71b117652c8d32dae7a7126b42
font_01_sfnt_off00006116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6116 18444 bytes
SHA-256: c9d7907f94a8ada23db2a769c78fce1d5854e09f64104062867272f149f89d70

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