Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef20552ff2ae5eb…

MALICIOUS

PDF

36.5 KB Created: 2021-05-14 10:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d10456c76ab0d403e9716cc13329408 SHA-1: 79e5f711722ed7850b0362697ad2506d3d284581 SHA-256: eef20552ff2ae5eb18ee9eafe0de760f40d4e53f089639d39474c978fddc315f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a malicious redirector lure, specifically referencing a 'free generator / game hack'. The primary IOC is the malicious URL that the document links to. While no scripts were explicitly extracted, the nature of the lure and the embedded URL suggest an attempt to lead the user to a site that may host further malicious content or phishing forms.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/is-roblox-hacked-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_003_off0000328f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328F 25104 bytes
SHA-256: 057646b79c4fd5906b99723f7a00dc9303416ca6157835a419767cb0931fc9dc
font_01_sfnt_off00006cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD7 18356 bytes
SHA-256: 0354344844298af16afd5a2e6ef08903fcba0fe1bf138aeb333889556374cdd5

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