Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc0ffe52255c3fe…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 17:19:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 599496bc6a3fc5fcea7f744db113cd0c SHA-1: 0ac6891ec7c551594b41eb8cef4a4c51c0b3517f SHA-256: 5dc0ffe52255c3fee86776bca26a7f5890e80f2c6930bad685fbf1c22dba7d91
62 Risk Score

Malware Insights

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

The document contains numerous embedded URLs pointing to sites offering game hacks and free in-game currency, such as 'free-robux-by-watching-ads-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures suggests a phishing or malware distribution attempt. The document body and heuristics indicate a lure to download further content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-by-watching-ads-game-hack
    • http://www.callong.cn/uploaded_files/userfiles/files/game-hack-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/wurst-client-18-9_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-roblox-exploits-unpatched_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/hack-roblox-arsenal_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-free-download-mobile_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-daily-free-link_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/builders-club-roblox-free-account_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/download-cheat-and-hack-for-roblox_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-coins-coin-master-daily_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/como-usar-cheat-engine-en-roblox_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-money-on-roblox-lumber-tycoon-2_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/hackaron-roblox-robux-hack_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/daily-spin-and-coin_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/pubg-uc-visa-card_GM1330123889.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-hack-tool-generator_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-hack-apk-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e07.bin
9d556e5dbabe37f49af3e53ea875bd1cf400699f62edef4b47ee7dca8a4f2ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E07 21916 bytes
font_01_sfnt_off00005e84.bin
f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 19660 bytes

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