Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccff3ba56bdc491…

MALICIOUS

PDF

38.6 KB Created: 2021-05-24 12:52:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 446cd3f380e93982ba6c73cc9fcb90f2 SHA-1: 1e65e8de2864548d76927e5821e709e7798f74a1 SHA-256: 7ccff3ba56bdc4913363a97090ae9bcf8d7dd2341e2ee9af69f67904a46f0983
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a lure for malicious redirectors, specifically advertising a "free Robux generator" or "game hack". The primary URL extracted, https://netcdn.xyz/app/431946152/free-robux-website-game-hack, is flagged as malicious. The document body also contains text and links related to this lure, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0134

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-website-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3035 25516 bytes
SHA-256: cf7876ee6736b4e279bd0320d000a7d9554f8110dfb03db10ceeffb7ec8ca3bf
font_01_sfnt_off00006b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 18436 bytes
SHA-256: 681a9996b59f8391b7cc91011c49ef4e68754eb5dc3ad8da1029f3e9c8ab03b4

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