Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd37357f939bbe9e…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 23:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5adb399e08e8f665bd60cc2f632df911 SHA-1: 373622b6405bf7b5930aee310b017fd57bd132bb SHA-256: bd37357f939bbe9e4ebcf556ff158d45ae730a1161056db73eac4f73ce4df8d1
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and text that explicitly promote a 'Free Level 6 Roblox Exploit'. The presence of a download button lure and the ML classifier flagging the PDF as malicious strongly suggest a malicious intent. The document likely serves as a lure to download and execute a second-stage payload, potentially leading to the installation of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.co/app/431946152/free-level-6-roblox-exploit-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-hack-roblox-to-get-emitted-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-robux-in-iphone-6_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/pokeballs-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-ghost-simulator-lua-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-combo-list_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/acount-hacking-roblox_GM431946152.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_off000030d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D5 22040 bytes
SHA-256: 2c5284b488e36367a437218f182a2db58ddc22bae3b2da750706222a80d3f0b9
font_01_sfnt_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 19332 bytes
SHA-256: b3e02352804837dd39af7c5fc26122b92b6754c8e873c800d3bb8dcc7a72824c

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