Malicious PDF — malware analysis report

Static analysis result for SHA-256 825ad9eb40924cc4…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 11:00:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8e6fd061998f3a0261877589a5efc1e SHA-1: 4eef3fd52fc6d46db1fe4ce50a75345d98a4b727 SHA-256: 825ad9eb40924cc46dcd7d50d8d6110c03f4f8c1e5bf38af8b1bc44fdf9e8968
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'cheats'. The heuristic firings indicate that these links are associated with known malicious redirectors and lures for free generators. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest a high likelihood of this document being used to deliver a second-stage payload or lead users to a phishing site.

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 http://netcdn.co/app/406889139/coin-master-hack-app-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/freecoins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-weight-lifting-simulator-2-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/walk-through-walls-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-nopde-enjin_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/kuso-ico-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7E 23164 bytes
SHA-256: 96903f5720d3c1d50e70e420f51371e28d91243e632a1261f0b04d89e508429b
font_01_sfnt_off0000634c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 18180 bytes
SHA-256: 5b637a8a036eab97bffff91a515cae84fc40b6bddd589e778cc2e69a12b03167

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