Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b9dc3d5bc51e47…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 06:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e8247bfadea15533e9eb4b786700992 SHA-1: 7ce3ce2f29e99433b909476a9430ebc4007e55b0 SHA-256: a2b9dc3d5bc51e47e1e3eb3f62fca5b7b6d9ea6a78be8fd730956a59f8a90f84
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free Robux' generator. The document body also contains similar lures and a call-to-action phrase. While no scripts were explicitly extracted, the PDF structure and malicious links strongly indicate an attempt to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

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/oprewards-free-robux-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_off00003a4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A4E 32580 bytes
SHA-256: 8d114a1a2084107c71cb38b323a4e83bdac3d97cd3832d803d54171d4e317048
font_01_sfnt_off000080b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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