Malicious PDF — malware analysis report

Static analysis result for SHA-256 a899f1506f5a40b7…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 13:59:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5c052a9530a20aa5e874868a80a9dd39 SHA-1: 4ff045ba5aad0de3f4f69173feb7f6868c254966 SHA-256: a899f1506f5a40b7d30fd7698141a6938747759a57546c56e3c703deaeb7e6c6
62 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs, including one pointing to an IP address, that are designed to lure users into downloading game-related cheats or currency. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. The ML classifier strongly indicates malicious intent, likely to deliver a secondary payload or facilitate further compromise.

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.co/app/431946152/play-kill-hack-roblox-v3rmillion-game-hack
    • http://183.91.70.11/repository/dev-free-camer-roblox_GM431946152.pdf
    • http://183.91.70.11/repository/free-coin-master-spins-blogger_GM406889139.pdf
    • http://183.91.70.11/repository/coin-master-village-cost_GM406889139.pdf
    • http://183.91.70.11/repository/free-robux-copy-and-paste_GM431946152.pdf
    • http://183.91.70.11/repository/free-robux-ad_GM431946152.pdf
    • http://183.91.70.11/repository/master-coin-master-free-spin_GM406889139.pdf
    • http://183.91.70.11/repository/free-robux-generator-2021_GM431946152.pdf
    • http://183.91.70.11/repository/websites-to-get-free-robux_GM431946152.pdf
    • http://183.91.70.11/repository/bullet-hell-roblox-hack_GM431946152.pdf
    • http://183.91.70.11/repository/robux-free-c_GM431946152.pdf
    • http://183.91.70.11/repository/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://183.91.70.11/repository/how-to-get-free-robux-hack-no-download_GM431946152.pdf
    • http://183.91.70.11/repository/how-to-hack-roblox-and-get-free-robux-using-tampermonkey_GM431946152.pdf
    • http://183.91.70.11/repository/roblox-free-full-download_GM431946152.pdf
    • http://183.91.70.11/repository/free-girl-hair-roblox_GM431946152.pdf
    • http://183.91.70.11/repository/coin-master-free-spins-apk-2021_GM406889139.pdf
    • http://183.91.70.11/repository/100-free-robux-no-human-verification_GM431946152.pdf
    • http://183.91.70.11/repository/roblox-report-hacker_GM431946152.pdf
    • http://183.91.70.11/repository/free-shirt-roblox_GM431946152.pdf
    • http://183.91.70.11/repository/roblox-girlfriend-cheating_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003001.bin
12ceae7ed7b591dbfad904270b3a6fb35a12f55124e98b8d62f6635b2614233c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3001 23076 bytes
font_01_sfnt_off00006370.bin
ffa778389f81357c7792ffc4421913e085815ccc75ac9299a3b50c9582dc249c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 19680 bytes

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