Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03bf52d6ec355a4…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 22:44:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f7a6b416123c3c86e70e27771487cbe6 SHA-1: 9829cbf2ddee8901ad325eeaaa86ca34d725b8d7 SHA-256: e03bf52d6ec355a47e98121ef0ca5a6da99662af7fc0d22d003d4e038a10f2ef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized links for game-related cheats and downloads. The presence of a direct link to 'roblox-cheat-install-game-hack' strongly suggests a lure to download malware. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/roblox-cheat-install-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pokemon-go-free-promo-codes-june-2021_GM1094591345.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-free-food-in-coin-master_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_004_off00005401.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5401 24368 bytes
SHA-256: 3b8a1ee04e8d008eacdf61ee3b1a823d11a36019b322d396c689d2055f93ea4b
font_01_sfnt_off00008b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8F 18280 bytes
SHA-256: ed24b09239d08d015834be4e3968d670e4f83a31ba1ce2522eb55c24fb49f33e

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