Malicious PDF — malware analysis report

Static analysis result for SHA-256 4093a13861d9f9eb…

MALICIOUS

PDF

37.0 KB Created: 2021-05-21 15:08:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 94bd6fdee91f20761ab97da4c5349838 SHA-1: a31bd57df8b978b1dd791be29f41d2bc3499528a SHA-256: 4093a13861d9f9ebb899bde7ad130cefc952b1dd50aad9f9de9cb1c2ec5e1977
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as offers for free game items, such as 'Minecraft Java Edition Redeem Code Free 2021'. These links predominantly point to a known malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to trick users into visiting potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/minecraft-java-edition-redeem-code-free-2021-game-hack In PDF document text
    • https://uofk.edu/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/generator-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/play-roblox-for-free-on-google_GM431946152.pdfIn 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_off0000346c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346C 25420 bytes
SHA-256: 5b62c51ea0557d1a6b818261dfd48ab8c54e24ded8b8d5e420b853986e5e9c50
font_01_sfnt_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 18824 bytes
SHA-256: 3e84327372ede1fb0dd75240746e2dc46639f78069d280fe972667d8e0b4261e

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