Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8c6fb129c91ab8…

MALICIOUS

PDF

39.3 KB Created: 2021-05-17 08:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: adef5c09d05d7b94d161c74a0e61b4ea SHA-1: 6b160d55b67c3dffa66beda976dc8701549a30bb SHA-256: 4b8c6fb129c91ab8f566d934b1d7ccd7c81ed40275609897457675ced56ffef9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and visible text that promote a 'free Robux generator' or 'game hack'. These links redirect to the known malicious URL https://netcdn.xyz/app/431946152/free-robux-easy-game-hack. The document's primary purpose appears to be social engineering users into visiting this malicious site, likely to deliver a secondary payload or conduct further phishing activities.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/431946152/free-robux-easy-game-hack In 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_off00003196.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3196 31368 bytes
SHA-256: bcae04454fb49f17f4f7771fa58feb65b7a7fcce2cd9d01b916f75707c73f42d
font_01_sfnt_off000077dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DC 18420 bytes
SHA-256: 93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e

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