Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfd8ca15592f8bd…

MALICIOUS

PDF

36.6 KB Created: 2021-05-20 21:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd7421adb78a29d212e11c32d9b969cb SHA-1: 5dd2e185a570a756f567e61e6df44bb0578c7462 SHA-256: fcfd8ca15592f8bdcab888c705680c952865c43497acb4faac84d4c18291aece
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack' lure. The document body and metadata indicate it was generated by wkhtmltopdf, suggesting it might be a crafted lure page. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-accounts-with-robux-that-work-not-banned-2021-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_002_off00002d06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D06 26932 bytes
SHA-256: 2dd0ae58ac5d2827a569b2806cc7fc3000f084920f92a3cf642d06799efc9f81
font_01_sfnt_off000069de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 19652 bytes
SHA-256: 72c791ad1c4340ed85ac0ecdba514e35635851f3f818d4a167a4eafc97bf1d2a

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