Malicious PDF — malware analysis report

Static analysis result for SHA-256 63851aeb6797faa0…

MALICIOUS

PDF

34.3 KB Created: 2021-06-17 16:15:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94ea4e9d2f81d4955822292d141099e9 SHA-1: abf1066568d444fc937924d642dec3853e33e70e SHA-256: 63851aeb6797faa0799f59989f0c93e3bf10ba3bb0f831d43963ccc9ea3b7e5c
102 Risk Score

Malware Insights

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

The PDF document contains a large number of SEO-optimized links, many of which point to websites offering game hacks and in-game currency. The ML classifier and PDF link farm heuristics strongly indicate malicious intent. The document body and extracted URLs suggest a lure for users seeking cheats or exploits for popular games like Roblox and Coin Master, likely leading to malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/roblox-ios-robux-hack-2021-game-hack
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-hack-spins-2021_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-admin-free-spins_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-executor-free-download_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/give-me-robux-now_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-coin-master-coins_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/can-u-get-free-robux_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-hack-ios-app_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-1-minute-2021_GM431946152.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-minecraft-server_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f87.bin
7ace7178409cc7d8bed31880afb29a469c91a0d1590a1e5ab656a3c316b37ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F87 22304 bytes
font_01_sfnt_off000060f9.bin
602e62d3be2cd8d6bd52ada224091ad6315149430600b7948bab4e713f863ee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F9 19012 bytes

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