Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae56253356e0f340…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 07:52:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e15a12cfdc4e838ba5cd160b7b29cd2 SHA-1: 237a6b166b6849c005e6022c7c5f64d215a65632 SHA-256: ae56253356e0f34059d7fb15bac27fe9177c48238b62daf733ce916f678e3409
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes 'free Robux gift card codes' and other game-related cheats, likely as a lure. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate external URIs and a URI pointing to a raw IP address, suggesting the document is designed to redirect users to malicious sites for downloading further payloads. 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/free-robux-gift-card-codes-2021-game-hack
    • http://110.164.163.187/ckfinder/userfiles/files/village-coin_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-printables-free_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-change-your-roblox-name-on-ipad-for-free_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-elite-on-roblox-murder-mystery-2_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-stuff-in-roblox-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/moon-active-games_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/robux-hack-tampermonkey-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-minecraft-accounts-2021_GM479516143.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/dominus-roblox-free_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/minecraft-font-free_GM479516143.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/robux-hacks-that-actually-work-for-everyone-on-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-exploit-roblox_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/pokemon-go-mod-apk-joystick-free-download_GM1094591345.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/roblox-bypass-cheat-engine-2021_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003171.bin
6c5a1aac75ff21d89968f0762504194c429763031039944a65b1288a835b4206
pdf-font-stream PDF embedded font (sfnt) at offset 0x3171 22708 bytes
font_01_sfnt_off00006473.bin
29e75f30c5e86761bb92b3b01e6b6c9178fe3a430d56702e6e4d31a38e0984ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 19516 bytes