Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee6e7f52b519c28…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 16:15:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92b31f597550193a6863f56eafe9501a SHA-1: a53a6857cf15f006a91b61728cb727a8a20c5dc7 SHA-256: fee6e7f52b519c28edc8302367c17ebbbc60be1bb4c892f65f416778b8da6806
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free Robux" and "game hacks" to lure users. The primary redirector URL is https://netcdn.xyz/app/431946152/rbxoffer-com-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious redirector chain designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/rbxoffer-com-free-robux-game-hack In PDF document text
    • http://www.marambio.com.ar/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.marambio.com.ar/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-roblox-characters_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_off00004920.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4920 27540 bytes
SHA-256: 6d1a22a3532c41e2731224bf9aeff8270cdb07ae903fe3d843350508d7869ed7
font_01_sfnt_off000087f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F0 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000091b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B1 18276 bytes
SHA-256: 9aeb6f41d3354634239b7c8beac9b422ae3978a513a1679011b82127add4d155

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