Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb918bed5297c7d8…

MALICIOUS

PDF

43.3 KB Created: 2021-05-18 02:35:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a7ebdd9ad6baf9dbd582cc50935e51ca SHA-1: 6acf48fbd41f4aac9811b8ae6d65fe610efda9aa SHA-256: cb918bed5297c7d8c3fe0cf7fd17d3dab205fa8a36bde685ec6238b9f113ccc1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action related to "Coin Master Free Coins And Spins Link 2021". The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs, including one pointing to a raw IP address, suggests it is designed to redirect users to download potentially harmful files. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-link-2021-game-hack
    • http://217.165.206.12/userfiles/files/60-free-spins-coin-master_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/free-minecraft-addons_GM479516143.pdf
    • http://217.165.206.12/userfiles/files/worst-client_GM479516143.pdf
    • http://217.165.206.12/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/robuxglobalcom_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-coins-2021-coin-master-link_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/strucid-aimbot_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/roblox-people-girl_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/robux-free-online_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • http://217.165.206.12/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/robuxfree-con_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b89.bin
d847bb27901a182ed21d785b256e6ec22a3b10c47dd42f2997d6593a94c7e3d5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B89 25948 bytes
font_01_sfnt_off000085fc.bin
71f56f689d85b0b5fb096b2af3108c2926ec739bdf89e53e90d40c81af8f43d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x85FC 18632 bytes