Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c057fa21c3be84e…

MALICIOUS

PDF

40.1 KB Created: 2021-05-12 20:06:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60ec37365ea69f3cb0de8b355cfae363 SHA-1: 83e9556f05692ef546ac8717f44075041c0a7e4a SHA-256: 5c057fa21c3be84ecec94252d1f6e0910d8784ce8e81055f0fcd2daab381fedb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'Roblox Hack Unlimited Robux' generator. This link, https://netcdn.xyz/app/431946152/roblox-hack-unlimited-robux-game-hack, leads to known malicious infrastructure. The document body and metadata also contain references to this lure, indicating a social engineering attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/roblox-hack-unlimited-robux-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_003_off0000305a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x305A 25888 bytes
SHA-256: 831732bfc4c913e916f4338601a588391241fc5bcf32042c806ef272af143641
font_01_sfnt_off00006b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 3992 bytes
SHA-256: 59b59434a7de68177f1017375975db15f90b2679616cf3f605346d1e3f910de2
font_02_sfnt_off000078a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 19168 bytes
SHA-256: c229ae85f225584a05b8ae3a5d05ef5eb919d65508796bcf435d04f59e516df3

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