Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3870fd5d836b77…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 07:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d24cd47a09b55a8e3f31324105b3460f SHA-1: d71cefd79a61e05d2b85f0b51bc6ef61445f4b46 SHA-256: 8f3870fd5d836b775240578a66576425e795d43a7176b3985b919c54fbcc5b2a
62 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a raw IP address pointing to files that claim to be game hacks. The ML classifier strongly indicated maliciousness, and the presence of these lures suggests the document is designed to trick users into downloading further malicious content. The document body, though heavily obfuscated, contains references to game hacks and URLs, reinforcing this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-spin-hack-no-human-verification-game-hack
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-hacked-com-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-rewards-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-200-spin-link_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/wurst-115_GM479516143.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-spins-2021_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-hacks-no-verification_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/lazyblox-com-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-hack-progamers_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/funbloxxyz-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a4f.bin
8340179a25d3c4db4a2a645318aad694fa224d75bfd613efb0047071c1089b26
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4F 24600 bytes
font_01_sfnt_off000082f0.bin
feaa68982acd17c800efc0836f6c7a3b9c97a222263dc84119fc0f3c695ff622
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F0 18428 bytes