Malicious PDF — malware analysis report

Static analysis result for SHA-256 402841172b977f73…

MALICIOUS

PDF

36.6 KB Created: 2021-05-24 10:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b4462d93a219cd962e78bf757569acb2 SHA-1: 9ef464193171cc33c1777c48352ccb81b912fbde SHA-256: 402841172b977f73a82029ac7006ecdb22e4f7ed8d53a81d2394e3afc806da18
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text explicitly advertising a "Free Robux Site" and "CLICK HERE TO ACCESS ROBLOX GENERATOR". These links point to a known malicious redirector infrastructure, indicating a phishing or scam attempt. The document's content and heuristics strongly suggest a lure to a fraudulent website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-site-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_002_off00002d68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D68 28324 bytes
SHA-256: 684f59ac5efb3ea469780b93e729e6f04d303a3d8cb962e05fde20d3c71a2c40
font_01_sfnt_off00006e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 18236 bytes
SHA-256: d17cd47be652198dd65b1182653c5b68eec39c9a25c2fe205f68dda680ae7be3