Malicious PDF — malware analysis report

Static analysis result for SHA-256 8611e9c3240f9b7d…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 23:47:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82762ea94aabb86b57cd8b042df014fc SHA-1: 8492dd33346fc3a97d5cf51e69502fb544e85396 SHA-256: 8611e9c3240f9b7d69c27a0bf7e423a117da9b9ba95bafb787ee94fc10dd9f68
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs, including one pointing to a suspicious domain related to game hacks and free servers. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to decrypt a payload, and the ML classifier strongly indicates maliciousness. The document's content and embedded links are designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/free-private-minecraft-server-game-hack
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/play-minecraft-online-free_GM479516143.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-accounts-for-sale-free_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/robux-free-gift-card_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/minecraft-survival-hacks_GM479516143.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/free-links-coin-master_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-admin-hack_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/free-spins-coinmaster_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-card-hack-app_GM406889139.pdf
    • https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cfb.bin
6cdebdfd8697482f4be9b05e24c5b29495df9fff5886600c16b4122677c68a3a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFB 25116 bytes
font_01_sfnt_off0000854a.bin
7ff77ee3a78605da9ef85fec4605ea670974ab48e4ca839a7389016eb6bc2a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854A 17836 bytes

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