Malicious PDF — malware analysis report

Static analysis result for SHA-256 8884ba3700f56baf…

MALICIOUS

PDF

55.8 KB Created: 2021-05-16 10:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d4901243af21312b608b6ec9118eef37 SHA-1: 35602501516bab2d380e21a7b8ebf8f2f21ac065 SHA-256: 8884ba3700f56baf260e495cdde75e93baa5c1ffc474d4538eebdf3b5dee5764
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and currency generators. The primary lure URL is https://netcdn.xyz/app/406889139/free-coins-coin-master-game-hack, which is also present in the document body. While no scripts were extracted, the PDF structure and embedded links strongly indicate a social engineering attack designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8407

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/406889139/free-coins-coin-master-game-hack In PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-robux-link_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004df5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF5 26796 bytes
SHA-256: 84206b851fd6cab3d1b779a741b66a6e307a734f25ffcda676b729bfea027739
font_01_sfnt_off00008cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off000097a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A8 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000aace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACE 17712 bytes
SHA-256: fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070
font_04_sfnt_off0000cb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0E 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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