Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a75aeb0f0da43e…

MALICIOUS

PDF

35.1 KB Created: 2021-05-20 17:53:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e7db01d1bd26265f582b3d1424e3fc27 SHA-1: 21f455746f98c69b29d065ae912594e8ce10d838 SHA-256: 59a75aeb0f0da43e56565329d1bfc9989e27d4f8e1d69455f2312c0c956c8cb5
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and text fragments promoting 'Roblox Hack Com' and 'free generator' lures, directing users to malicious domains. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://netcdn.xyz/app/431946152/roblox-hack-com-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-coin-master-app-download_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
stream_002_off00002ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF0 24776 bytes
SHA-256: b0e6327153c501474fa3186fa27616a3dfe4f0d6f60bcaf61f240d6ac6e06fe1
font_01_sfnt_off00006950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6950 18440 bytes
SHA-256: 92e56247950081f5f8ea935637ec6d93dafa31aa334148af106ab9a8365bd2e0

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