Malicious PDF — malware analysis report

Static analysis result for SHA-256 8040bc4320842e7e…

MALICIOUS

PDF

33.6 KB Created: 2021-06-18 08:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c00f4ada3eb2830d9de5574bbe69be2a SHA-1: d2e8b8b90c4cfd66fb90e132d8954908193cb560 SHA-256: 8040bc4320842e7e8122616da82c3dab168edb3cd209ab07d98d8f79e91a5583
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirector infrastructure, specifically promoting 'free generators' and 'game hacks'. The document body and heuristics confirm these links are designed to lure users into clicking, likely leading to further malicious content or downloads. No scripts were extracted, but the primary attack vector is the redirection via these URLs.

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/431946152/rxgate-cf-free-robux-code-game-hack In PDF document text
    • http://serviio.org/images/nuevo-hack-atravesar-paredes-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/get-free-roblox-trades_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-get-free-cash-on-horse-valley-beta-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/roblox-counter-blox-hack-download_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/ccv3-roblox-hack-tutorial_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/i-think-i-just-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/app-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://serviio.org/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/hack-robux-hack-hack_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/roblox-free-weapons_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-game-android-free-download_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
font_00_sfnt_off00002d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D16 22260 bytes
SHA-256: 058995ef7bdac9e1a0157ba02b29564ae61e9e41302bad3cfdca7505b7d2b932
font_01_sfnt_off00005ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 18808 bytes
SHA-256: 6c50e460a22a92d029102358f64fc13ebe22f295bf31a98d7f287710ad09e387

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