Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb2a7eacd2d815c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 03:44:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1e01c0260358400fb409e00f4f8f713 SHA-1: 2683b593ee8d45becf5d76a95aa6acbf2d76fd2b SHA-256: 5cb2a7eacd2d815cb65c96b49563247a56a19d7b0bf3487944a22f01dbebdabe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are presented as hack tools for games like Coin Master and Roblox. The presence of a large number of external links, coupled with the ML classifier's high confidence score, indicates a malicious intent to direct users to potentially harmful content. The document body, though partially corrupted, also contains a URL related to a 'Coin Master Hack Tool'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-tool-2021-game-hack
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-prison-life-hack_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-daily-rewards-link_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-spin-ios_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/minecraft-pe-server-hosting-free_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-cheat-codes_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/instantrobux_GM431946152.pdf
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c37.bin
f8b58d64cfde7380014b77b80827fc58bba39940d49ce49749970f15585bb249		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C37 24080 bytes
font_01_sfnt_off000082e5.bin
811befa785f1ceb1181632f77b53e437429424eef4610f298aaee61bf5104641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 18192 bytes

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