Malicious PDF — malware analysis report

Static analysis result for SHA-256 83556d424f9c24dd…

MALICIOUS

PDF

39.1 KB Created: 2021-05-23 05:46:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8486c47c02be3715150723bd62536af0 SHA-1: 3b32059641cdca9609c35d74ed71f67ee94b2064 SHA-256: 83556d424f9c24dd0b35d0599f319eec2954bd3ed3a0174fa98daad6ee2cc718
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising 'free generator / game hack' content for Coin Master. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9408

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/406889139/coin-master-free-spins-daily-game-hack In PDF document text
    • https://www.brightwake.co.uk/uploads/files/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://www.brightwake.co.uk/uploads/files/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.brightwake.co.uk/uploads/files/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.brightwake.co.uk/uploads/files/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://www.brightwake.co.uk/uploads/files/files/how-can-you-get-minecraft-for-free_GM479516143.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_003_off00003976.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3976 26256 bytes
SHA-256: 26ae770a7f9a4743e228437c7e5bfd9c1e4980eb0d18484ad0ce77f065195c6d
font_01_sfnt_off00007741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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