Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9db00d4386c27b…

MALICIOUS

PDF

39.8 KB Created: 2021-05-11 18:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 540bb5d327c1e55236cf0e1f1f39321e SHA-1: 362db6e070d77326fa2cea792c2a6bf655b689a9 SHA-256: 4b9db00d4386c27bb63c4cac4b209e7b9b83e08802212bfcad62438a5e38a58c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body, though partially corrupted, contains text related to this lure. The presence of a call-to-action button further supports the malicious intent of tricking the user into clicking the link.

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/free-roblox-com-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_003_off00003297.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3297 25216 bytes
SHA-256: a3c1829a4c4eb8add6b8e827428ed5692fb1cb27b660b6479c354f18ba26ae9d
font_01_sfnt_off00006d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 3988 bytes
SHA-256: 1ba32a5139c6de22584ee0f72d573162a644f7c4206fa3a2a8dea775e8e2a087
font_02_sfnt_off00007a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 18208 bytes
SHA-256: a8b78c346849e492d79c6e108c6b39d90d98748c1a8fa70f2ffbc01f5a97eafd

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