Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e74d96e96fa3d3…

MALICIOUS

PDF

30.7 KB Created: 2021-07-21 00:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c17d6fa5af0f27068d2b6b5596cb1ae SHA-1: 536f032e9732391977036035adb88ee3264bf523 SHA-256: 71e74d96e96fa3d38056f09900fdacdc5daa4429aa2e125323f38ca99c6f58d8
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body text and heuristics confirm the lure is for free Robux, a common tactic for phishing and malware distribution. The use of a redirector suggests an attempt to obscure the final malicious destination, likely a payload download or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0483

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-easy-no-download-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
font_00_sfnt_off0000210a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210A 22500 bytes
SHA-256: 2abbfb57d8be75e547620fd62e1ad67fb0b6c002f9a87bf48ef5316f2a2e2b17
font_01_sfnt_off00005338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5338 19292 bytes
SHA-256: 54df6ab7cbd8da040d3fc0d471fd38ed670923c029d75c86ffa3c2631ce9a33c

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