Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b0242893fcfe1e…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 17:39:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1563e84afdd0e5219dc3bcbd0bbed5e2 SHA-1: afe3217f8d71f64fb6ff844918587a36506bac71 SHA-256: 79b0242893fcfe1ecbe1adda8a960549bbf7e655c1de2e35a437284b437abb37
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that attempts to lure users with promises of free game items, such as Roblox gift cards and Robux. The presence of external URIs and a URI pointing to a raw IP address suggests the document is designed to redirect users to download further malicious content. The ML classifier strongly flagged this PDF as malicious.

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/431946152/roblox-gift-card-online-free-game-hack
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-robux-generator-no-human-verification_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/spin-free-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/wurst-download_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/hack-coin-master-spin-android_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/will-minecraft-ever-be-free_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/robux-generators-that-actually-work_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-minecraft-skins-java_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/get-me-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b2.bin
735696b5f9029de392abe0387c0d59070d605bfcfca925aa4bfd32c531d971fe
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B2 25392 bytes
font_01_sfnt_off00008237.bin
df9893eb1f0d0b90ef1012123e626362df07f41b7e954edba7018aa352f9b9fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 18572 bytes