Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2a5f6ef69a721f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:56:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9e54d090f957734f5737b69eafa0a4f1 SHA-1: 39508d5907d2c0c61a32184b6bc395e2597ce0d2 SHA-256: 7c2a5f6ef69a721fd5ee9522beed822943756ca04d06f8a7c32e2b014f9ef92d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and references to game hacks, specifically for Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious. The presence of external URIs and a clickable URI pointing to an IP address suggests an attempt to redirect the user to download further malicious content or exploit kits.

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/make-robux-game-hack
    • http://110.164.163.187/ckfinder/userfiles/files/jj-script-roblox-hack_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-haktuts_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-hack-roblox-games-on-android_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/android-fast-robux-hack_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-spins-twitter_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/abd-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/allsmo-free-tiktok-and-instagram_GM835599320.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-roblox-outfits_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/get-free-robux-inspect_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-tiktok-followers-no-survey-or-verification_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003069.bin
a3df78cf700181262ac53934b0210b06e065798e31c292b32d0989090b033fea
pdf-font-stream PDF embedded font (sfnt) at offset 0x3069 22528 bytes
font_01_sfnt_off0000629d.bin
ea53d75d75d9beff3d4f9af2218e51df711d02c8d5b726b14a498621087d2188
pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 18916 bytes