Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6426a0b1fe2dbc…

MALICIOUS

PDF

38.9 KB Created: 2021-05-10 16:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a061390b4049123d33c5ea8e95be163 SHA-1: 5b0a99dcb4ab96ef6a0188f08d219f28a38ecf82 SHA-256: bd6426a0b1fe2dbcb62661e1d86ca287407ae5431a2f71b57eb8977724698ce3
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" to lure victims. The document body and heuristics confirm the presence of these malicious redirector links. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in online games to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0289

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-groups-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A8 24620 bytes
SHA-256: 914fe813d229521d84469e974522c9d2c6caf6dd8a4a4da4b87c659f1f4b37f1
font_01_sfnt_off00006bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC8 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000758a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 18592 bytes
SHA-256: 40c688a228a34b1cb0523430700763228a7eb04120cc8b5f4f4e5fd2bdb4007a

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