Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a8304ab8dfc47e…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 15:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e74507096808a77e142c28af25d93792 SHA-1: a4a49338fbe87f1e1b9f64ac024acfe0fdff9cd7 SHA-256: 53a8304ab8dfc47e9a09f327a87697a976391ee8a1e9f689421b3c3be11fa9e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically promoting game hacks and free spins. The document body and embedded URLs strongly suggest a lure designed to trick users into visiting these sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead to further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/como-generar-coin-master-free-spins-game-hack In PDF document text
    • http://oddgraphic.com/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/real-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://oddgraphic.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://oddgraphic.com/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://oddgraphic.com/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004794.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4794 24280 bytes
SHA-256: c43e4a74e27e3980a0e3c8d14ff044e33851d73a8e4c07502431e484534f0c92
font_01_sfnt_off00007f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00008c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 18148 bytes
SHA-256: e996c84c04af77a25dc17a749cf1e0dcd354e3ea4fa8f611880f16c604898bf5

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