Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc2617b5c79ff7d…

MALICIOUS

PDF

31.2 KB Created: 2021-07-19 06:54:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d539ab3e7f47fa8d8f8718003683582 SHA-1: 2a04911f9ce15a8902d6fd381537a5e89e16e964 SHA-256: dbc2617b5c79ff7d3eb371ee1bcee086c7943603df75976d004f99be2f12441b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'free Robux generator'. The document body and embedded links suggest a phishing lure designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.1198

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/free-robux-without-downloading-apps-game-hack In PDF document text
    • https://www.jjpremiers.com/files/roblox-pink-free-robux_GM431946152.pdfIn 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_off00001f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F34 23028 bytes
SHA-256: aa2817b2b3c75e0d5a4e9ad6910f89222792dff6958725004c9f003e6d444740
font_01_sfnt_off000052f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F2 20060 bytes
SHA-256: a8fbfe7f7d9ee5c6d1e0a9d54f6a8f2618b4750cae31927e831424281ea5393b

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