Malicious PDF — malware analysis report

Static analysis result for SHA-256 803c6432eeee965a…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 13:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e9a9dffb554ede7b3fe8dfcbd193a22e SHA-1: cbd35ea2d044b4168fe7bc791bb9df663163ef38 SHA-256: 803c6432eeee965ae5f30e5e96d211de65c85151733bce78c0c6a90d42bed530
82 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it links to a game hack lure, specifically targeting Roblox. The embedded URL points to a suspicious domain that likely serves as a redirector or download host for malware. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading potentially harmful content.

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.co/app/431946152/roblox-prison-life-hack-mac-game-hack PDF link annotation
    • https://nature-air.com.tw/upload/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/win-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/can-pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-10k-robux-by-redeem-code-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/robux-today_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 21980 bytes
SHA-256: 22a773abbd293135c7eaa214622e689601b0f1a6eb7e02ac229449600b4b302a
font_01_sfnt_off00006035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 19124 bytes
SHA-256: d5f08f044bd33c98bcf75409619a25f19b9563b487a4f05d51cec4a837732b83

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