Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b68b6decbfbb88e…

MALICIOUS

PDF

43.4 KB Created: 2021-05-12 20:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 976f447975b3267e7172b58b8ae60f8b SHA-1: 92a0ab92226d2a713fab15e67ac8f25b93cd41a3 SHA-256: 8b68b6decbfbb88e2205bc1deb1feef63dde43e55886b537ee0d4ec07c533bc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "free generators" and "game hacks". The primary link, https://netcdn.xyz/app/431946152/apps-for-free-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/apps-for-free-robux-game-hack In PDF document text
    • http://echosvoix.ch/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://echosvoix.ch/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://echosvoix.ch/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://echosvoix.ch/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://echosvoix.ch/images/free-spins-coin-master-2021-app_GM406889139.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_off00004a40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A40 27092 bytes
SHA-256: 131ca7c6531ac354893eddafa47072fd9271257c51340f31999c20c04223e45c
font_01_sfnt_off000087a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A6 18192 bytes
SHA-256: b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b

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