Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f43b0342f8c0db…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 18:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1b5d3d16fe07cb0e784c100066fe6ea4 SHA-1: bc72bd2ea7cbd46f4f05aceff4cc184c3be42ad6 SHA-256: 80f43b0342f8c0dbc9f85fb4f8a6135d20443d11663576480a607b225ab28d35
62 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs and a document body that explicitly advertises "free robux" and "coin master spins", indicating a lure for users to download further content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs, including one pointing to a raw IP address, supports the conclusion that this document is designed to redirect users to malicious download sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/how-to-get-roblox-credit-for-free-game-hack
    • http://217.165.206.12/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/coin-master-link-spin_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/hack-robux_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/earn-robux-for-roblox_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/robux-hack-me_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-spins-from-coin-master_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/easy-way-to-get-robux_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/roblox-sexually_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/free-roblox-cards-pin-number_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/free-scpf-site-roblox_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux-videos_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://217.165.206.12/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-minecraft-account-generator_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eed.bin
3e9514e87cd371917a08ccebbd941f8c5bee8fe7fd8c19b6332c35e7e315d87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22660 bytes
font_01_sfnt_off0000619b.bin
6fa99d77eabed09a15600f46206c06344a6246eb44710121d4e1b5c839b79c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 19212 bytes