Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd5cf5c3c9a3f64…

MALICIOUS

PDF

38.3 KB Created: 2021-05-25 07:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 111a1441bed3ce12f006300f3536297b SHA-1: c7d3c0d128f04837f43206a61c4610c4ed2f3af1 SHA-256: 6fd5cf5c3c9a3f6412959ba8dce15f34d63b837d67380901673779cbdf62668d
130 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-come-game-hack, is identified as a known malicious redirector. The document body also contains similar text and the call-to-action phrase 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. While no scripts were explicitly extracted, the nature of PDF links and the presence of redirectors suggest a potential for client-side exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002bc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BC1 26084 bytes
SHA-256: 385d79c3b1ea3f947116412a70b3aa7b30b203a4fd20a3e426c7421d357ed879
font_01_sfnt_off00006778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7489 18276 bytes
SHA-256: d7491fe45cc88596c87233a963b6162720bf27c142cea717df16fbc09fa29ea6

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