Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05d80c6558e4b25…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 08:30:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 39e23ab3e9351f56136881360b9789a2 SHA-1: 467295c64e88faf0b8fd5e6c05fecc9b1929cb54 SHA-256: b05d80c6558e4b257e59ac09ee774ee8f9df7d84508fb2eca87c9bfca39e6320
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for "free Robux" and a direct link to a URL known to host game hacks and generators. This URL, http://netcdn.tw/app/431946152/free-robux-without-doing-anything-game-hack, is likely part of a phishing or scam campaign designed to trick users into visiting potentially malicious sites. The document's structure and embedded links suggest an attempt to exploit user interest in free in-game currency to redirect them to a malicious resource, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/free-robux-without-doing-anything-game-hack PDF link annotation
    • http://www.jureclomas.com.ar/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/coin-master-daily-free-spin-app_GM406889139.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_off000029d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D0 22056 bytes
SHA-256: 13db0997537689dbb2a6ac92c26f85dc5f1242ba578332dd358aae7ee02837aa
font_01_sfnt_off00005ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 19424 bytes
SHA-256: ce4897eff9d04202a557cf473123b6bbe5415239b22eda76d44945625b44829b

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