Malicious PDF — malware analysis report

Static analysis result for SHA-256 77803dd1c4bb0f17…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 09:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 99a491b8ce161e9e9263413bc86a6964 SHA-1: 51e4c6d9783043470052ecddbe12322f31d0df7d SHA-256: 77803dd1c4bb0f17630537979304386c553eba2a91f507b4e397998c3cc1f9b8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text promoting a "Coin Master Hack" and a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call to action. The primary external URI points to a suspicious domain known for hosting game hacks and potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest it is designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/406889139/coin-master-hack-game-hack
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/minecraft-ps4-free_GM479516143.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/minecraft-iphone-free_GM479516143.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-master_GM431946152.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/coin-master-free-spin-codes_GM406889139.pdf
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dea.bin
b1761faa6928780262759632f27d6a7a0e278f011df1d36fcc694b711269bc80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEA 22952 bytes
font_01_sfnt_off0000616d.bin
c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 17716 bytes

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