Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2556c105b7f9082…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 10:27:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73df776e59d8bb02698845256d537f36 SHA-1: a2574c27312e9d2a2cb13b47d335fc6fb0085322 SHA-256: a2556c105b7f908276ab0e3acb919b4f383280412a3a932048d4b055918ed991
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises free game currency and hacks for popular games. The primary external URI, http://netcdn.tw/app/431946152/roblox-character-free-game-hack, likely serves as a landing page for a malicious download or exploit. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/roblox-character-free-game-hack
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/hack-coin-master-app-ios_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-hack-for-robux_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/hack-roblox-accounts-2021_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-without-downloading-apps-on-ipad_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-hack-on-roblox-games-phone_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-executors-for-roblox_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/download-hacked-games-com-coin-master_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/level-7-hack-roblox_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/dungeon-quest-roblox-hacking_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/hack-for-wieght-lifting-simulator-3-roblox-pastebin_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-do-you-hack-in-roblox-by-using-a-phone_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-codes-2021-september_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-hacker-vs-admin_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f6a.bin
3a22544802053f9dab5a022803820e6e7778557862c252348f8321ca2b9e4e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22788 bytes
font_01_sfnt_off00006273.bin
b5474294296d9f5b9ea12a54036d97a64d26d44eeb49bdd78dad108d1826d115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 18920 bytes

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