Malicious PDF — malware analysis report

Static analysis result for SHA-256 270075f5300b0d3a…

MALICIOUS

PDF

40.9 KB Created: 2021-04-23 15:29:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bef56b53093b0bd3c69052c1efa1d317 SHA-1: a774b4f3c95b99c18e9f7334a147b978a25d0e5f SHA-256: 270075f5300b0d3a4d4bcb6350ede2ec7404c4abb4010ee8e0f1da070e8fdff1
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Roblox Hack Script' and directs the user to a URL that likely hosts a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of multiple URLs associated with game hacks suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://netsecure.top/app/431946152/roblox-hack-script-tampermonkey-game-hack PDF link annotation
    • http://gornjastubica.hr/files/free-coins-in-assassin-roblox.pdfIn PDF document text
    • http://gornjastubica.hr/files/pastebin-free-robux-2021.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/blox-best-free-robux.pdfIn PDF document text
    • http://gornjastubica.hr/files/numeros-de-roblox-hacker.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-hack-sword-art-online-roblox.pdfIn PDF document text
    • http://gornjastubica.hr/files/easy-way-to-hack-roblox.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-robux-obby-husky.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-song-codes-for-roblox.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-hack-roblox-games-2021.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-get-free-25-robux.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
stream_003_off00004123.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4123 25776 bytes
SHA-256: c668598f950980fb2c56d6b58557ca32611a1ba003156dd542b04ac5c01c5043
font_01_sfnt_off00007bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 19020 bytes
SHA-256: d4c9cfe5378a2420a829cc7826c00d56a0565086831e82f25cf9c9f533861af0

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