Malicious PDF — malware analysis report

Static analysis result for SHA-256 254a26515859f714…

MALICIOUS

PDF

36.1 KB Created: 2021-05-21 16:21:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: adf766b82cc33a7f605a2a32276cb71b SHA-1: c2ab94c7f2f51c543e07ac6fafe05d29a218c85f SHA-256: 254a26515859f7140d3620682c319b665bb373cc9f3634280cb10f89ec9fde7d
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector domains, specifically advertising 'free spins' and 'game hacks' to lure users. One primary URL, https://netcdn.xyz/app/406889139/free-spins-coin-master-links-game-hack, is identified as a malicious redirector. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a client-side execution or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/free-spins-coin-master-links-game-hack In PDF document text
    • https://koeltotaal.com/images/get-more-robux_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/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_off000033be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BE 24648 bytes
SHA-256: 7d0fdafe35b3d69e4a4e63a357608472ee757f82e2dc12dd5832f0942e21358b
font_01_sfnt_off00006c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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