Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4a6e9e06df480e…

MALICIOUS

PDF

40.9 KB Created: 2021-05-16 13:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9405dd7837543fb5f6f131f40bb6de37 SHA-1: eee0b0fb5bf4bd355524239a9c5594b938bf77c7 SHA-256: 8d4a6e9e06df480e3ff521a8ab82689341abd2f85c59d648b5d2bf98ca15f07a
130 Risk Score

Malware Insights

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

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'free Robux generator game hack'. This lure is designed to trick users into visiting the malicious site, likely to download further malware or engage in credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/how-to-get-free-robux-generator-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3063 29668 bytes
SHA-256: f2ce16637e548093780e70fbb9480929f57785351773d3bc21e957ecefd43b49
font_01_sfnt_off000070f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9F 18512 bytes
SHA-256: 02a745270f20da848e9c9bdefc0721d63769b74524dfc6c51231bae9bb0d5f7b

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