Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02d1cc57bad81b6…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 14:06:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a83f61dc3800ba6d6b61b4015bae565e SHA-1: 55d084bf91827c445439e96189336648b821eaaa SHA-256: d02d1cc57bad81b625e3abad2a7a4785a010ced05650ff8736db3569ec8ae2ae
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a 'download button' lure, directing users to websites offering game hacks and free accounts. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed to distribute further malicious content or lead to phishing pages. No scripts were extracted, but the overall pattern is consistent with a malicious document used for initial access.

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/free-roblox-accounts-google--game-hack
    • http://niceviaapia.com.br/images/ckfinder/files/free-spin-coin-master-instagram_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-apk-ios_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-me-robux-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/hacking-2-step-verification-for-roblox_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-cheat_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-generator-without-human-verification_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hacks-com_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-version-ios_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-skywars-mega-vip-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-counter-blox-esp-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-human-verify_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-gift-card-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ac.bin
a6249ecdb53a1e1611483e76480b47000c60718019faebf27d8398b4cfae1d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AC 21892 bytes
font_01_sfnt_off0000640b.bin
121768de0ca345301d3ddbf011228385ebe1db0df00a8045f161068021127629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 18896 bytes

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