Malicious PDF — malware analysis report

Static analysis result for SHA-256 0528ceb8c8be8252…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 15:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1bcb28e8e0686aa807d3f27f7c2f90a SHA-1: d3069ffc1d06f2064fbe948fefa365cab1a2654e SHA-256: 0528ceb8c8be82528b739654ac36802bea980f996f3dde5395ef4cdabf01eb35
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these sites, which likely serve as a gateway for further malicious activity such as malware downloads or phishing. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-free-robux-2021-no-human-verification-game-hack In PDF document text
    • https://www.cosmosdawn.net/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/i-robux_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/roblox-help-free-robux_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_003_off00004acc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACC 26148 bytes
SHA-256: b0007bf709221e3c7a01defb29cafb5ef55aad70c7d079bf00c0ba28ad18d8cb
font_01_sfnt_off00008844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8844 19428 bytes
SHA-256: dfc7ca414cfca4f80301273998e01ceb4bfd22e3de883fcbe9d6a0102e8d41a4

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