Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37d17b82302cea8…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 10:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ca7e2ce657cc362cb5d3d9059076a64 SHA-1: 88c5248c3b53eacf26216efe66d2bca6885006d0 SHA-256: b37d17b82302cea8a928fef116a1bf03dcaea1e4e85e8f6a79a437d79aada0ab
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous embedded URLs and references to free game hacks and currency, strongly suggesting a lure for users to download further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a clickable URI pointing to a raw IP address further supports the malicious intent.

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/how-to-get-free-robux-no-human-verification-game-hack
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-get-game-pass-for-free-roblox_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/robux-place-rewards_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/undetected-cheat-engine-for-roblox_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/well-hack-net-robux_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-vehicle-simulaor-hack-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-instantly_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-err-face-roblox_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/download-coin-master-apk-hacked_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-shields-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/cheat-ro-ghoul-roblox-rc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f47.bin
3726700dd4949e36a9464ec9dc05dea419437874f515bbd38a14443f277f2a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22316 bytes
font_01_sfnt_off0000605d.bin
1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 19496 bytes