Malicious PDF — malware analysis report

Static analysis result for SHA-256 da14b4133faf87b1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 19:34:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d840d4cfa498e3fa7fe951cca1ad7343 SHA-1: c42d362c35ca3df0dd506f7e398f7cf7b151ac6f SHA-256: da14b4133faf87b1c5b92b2529a4865ed84055a380388119379b0be5caa7e542
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/robux-game-com-game-hack. The document body and numerous extracted URLs reinforce this theme, pointing towards game-related exploits or scams. While no scripts were extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to 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.tw/app/431946152/robux-game-com-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/beyblade-rebirth-roblox-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/blaze-games-co-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/grab-points-login_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-june-28-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/speed-hack-code-for-roblox_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB8 22360 bytes
SHA-256: a3f4b6a8d10d8e042a6d4e0f374342f636a476a45408d66ab7e2ef4875ce29d6
font_01_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 18812 bytes
SHA-256: 184f0dd2eae8becf0c01250fb4d51c2c32cb4eda49217c2e7ddccebd1d6c8e21

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