Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a33c61c8657e018…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 08:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f66cc8a7af3ead97f8da6fdccc5e9a41 SHA-1: e3b7245b5a05749fb417477df9059646bb5c660a SHA-256: 2a33c61c8657e018b668ed7c6e1c5c5812123673cd59c4b2cbdb9bc42d6c737f
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a malicious download, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the embedded URL pointing to a suspicious domain. Furthermore, the 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document attempts to trick the user into executing commands via their clipboard, likely to download and run a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/hacker-roblox-games-game-hack
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-minecraft-accounts-reddit_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coinmaster-rewards_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-tiktok-followers-trial_GM835599320.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-spin-link-coin-master-today_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-make-a-group-in-roblox-for-free_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-dresses-for-roblox_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-free-robux-cheat-engine_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-without-doing-anything_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-spins-cash_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-free-roblox_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-cheat-client_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-minecraft-texture-packs_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/pokemon-go-free-and-nintendo-switch_GM1094591345.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-de-free-drive-roblox_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-free-games-no-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fad.bin
dd10d26bd6adccf9c81602142a67d985146034640bf412781d66616704b528fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 22444 bytes
font_01_sfnt_off000061a6.bin
7485082c03cba76875aaaee79a75a17c2463067be6b9aec9d88998c286ac0c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 18916 bytes

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