Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2a61a78b4463ff…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 08:05:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 94dee92cd47c417e1464f57bb85a4562 SHA-1: c7a41bff31bc7bfd04d76e00a6475f97bd36811f SHA-256: 6b2a61a78b4463ffe65ec0b62cf9e0c14fbd67b1d6bf70b2127614d324177788
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a malicious redirector. The document contains multiple embedded URLs that lead to various game-related cheat sites, many of which are hosted on the same domains. The presence of these links and the ML classification strongly indicate a malicious intent to redirect users to potentially harmful content.

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.tw/app/406889139/free-coins-and-spins-coin-master-game-hack In PDF document text
    • https://www.zagi.hr/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-on-roblox-2021-khaos_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/vrbx-club-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/minecraft-java-edition-for-free_GM479516143.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_002_off000030c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C2 23424 bytes
SHA-256: e195272b41c17e2a4338d76d72b4d31ce83ba2bd2f10dca574866a639c04c610
font_01_sfnt_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 18348 bytes
SHA-256: c90f632020bcb1e728f62a43997badda2860e0d329262e99dedc1f8a12c39115

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