Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b82cee08078a48…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 19:25:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0afd34af997cbe53fea98882817f5587 SHA-1: 5bda5a569778cd738cda7101e8765413d56fdf8a SHA-256: 20b82cee08078a48de17a4e663531480908a30c42d60889a0f3b26bddec935ae
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 and a call-to-action phrase, strongly suggesting a social engineering lure. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and extracted URLs indicate an attempt to trick users into downloading applications by promising in-game currency or followers, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/406889139/coin-master-free-spins-app-game-hack
    • http://110.78.114.242/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/robux-free-c_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-minecraft-codes_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-tiktok-followers-instantly_GM835599320.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/is-minecraft-free_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/tiktok-free-views_GM835599320.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-app_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c7e.bin
2716d7f6c5528a73acd4e2527503170732d27a2cfd06f161b59938a09e654991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7E 22772 bytes
font_01_sfnt_off00005f97.bin
21af4872a04c62c178ac31651a333ecdcea5bb1ed4ceeeef1956d42e8fc37ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 17884 bytes

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