Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d522f0f5b80330…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 23:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 642a5555a599daa052829c81862633cb SHA-1: 720d4f6d64f95e9451ac4f912730d7b47279c081 SHA-256: d8d522f0f5b80330813609ea07ef6f7e6e43b037a371451951e487f8b6a6b2b1
122 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDF files, many of which appear to be SEO-optimized lures for game hacks and cheats. The presence of a 'download button' heuristic and a high ML classifier score indicate a malicious intent to redirect users to potentially harmful content. The primary URL, https://netcdn.xyz/app/479516143/minecraft-windows-10-free-game-hack, is likely the final payload destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/minecraft-windows-10-free-game-hack
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/when-was-minecraft-free_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/collect-robux_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/wurst-115-2_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/get-robux-now_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/try-coin-master-hack_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/minecraft-112-hacked-client_GM479516143.pdf
    • https://www.yout
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cb4.bin
5ffcfb3f0ad8ffca52c2e94d4a2a49cd92b6e4e179d8d95ac15ef826dacfa77e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB4 25416 bytes
font_01_sfnt_off00008718.bin
61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8718 18524 bytes

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