Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8bd138a803f4d1…

MALICIOUS

PDF

37.8 KB Created: 2021-05-12 01:04:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 18dccec9cc955fb09efaf188c5fe81aa SHA-1: 8435fa8c98139ab9124f26eb661c9da95a1aef0a SHA-256: bd8bd138a803f4d1f44f75fb4a1e245333fff8841de1204aa6b24c1cd5799b1d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and a 'game hack', directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or scam attempt. The document's structure and embedded link suggest it is intended to trick users into visiting a compromised 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/free-robux-generator-2021-no-human-verification-or-survey-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_off000034a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A6 25044 bytes
SHA-256: ebf5d18021d2a9b7ec643686918e62d6a2b72772645a156c98b26ea230ecfb16
font_01_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

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