Malicious PDF — malware analysis report

Static analysis result for SHA-256 5658dd38f07c36f4…

MALICIOUS

PDF

39.1 KB Created: 2021-05-15 14:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1c7b4d48df315eece0e45f8e50204116 SHA-1: e692006c8a17e1a00af26b27ab57a805f6b0bf69 SHA-256: 5658dd38f07c36f4b8616b88ff1c8717f7dee3fe260cf46bbc5df6ea2937164d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' which redirects to a known malicious infrastructure. The document body and heuristics indicate a deceptive attempt to trick users into visiting a malicious URL. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the malicious redirector suggests a phishing or scam attempt.

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/how-to-get-free-robux-no-human-verification-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_off0000352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x352B 28644 bytes
SHA-256: 555a55303c9239d194f6105b54e10eba4a5a945a18c213a2318e0d37906bcb37
font_01_sfnt_off00007559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7559 19024 bytes
SHA-256: add4238412854312c544fb77f8d10d54d15c3f72dfb550af23f9090805c2c756

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