Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda1a6d17432b19b…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 15:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 05a292882e3abfaec34b7bda5e7fc477 SHA-1: 53f5f6ec16c62a6d370edfd22f97e2dcb6cc60a8 SHA-256: bda1a6d17432b19b6dffe86b7cf8e291fe8ba94db49c46c32665dc12d44db50e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple lures for game-related cheats and hacks, including "Coin Master Hack" and "free Robux", directing users to external URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites or initiate downloads. The document body text and embedded URLs strongly suggest a phishing or scam attempt.

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-https-coinms-net-game-hack
    • https://www.wcauk.org/uploads/files/files/lazyblox-com-free-robux_GM431946152.pdf
    • https://www.wcauk.org/uploads/files/files/play-minecraft-for-free_GM479516143.pdf
    • https://www.wcauk.org/uploads/files/files/robux-hacks-2021_GM431946152.pdf
    • https://www.wcauk.org/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.wcauk.org/uploads/files/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://www.wcauk.org/uploads/files/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • https://www.wcauk.org/uploads/files/files/minecraft-hacked-client_GM479516143.pdf
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • https://www.wcauk.org/uploads/files/files/promo-codes-for-free-robux_GM431946152.pdf
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002cd1.bin
f13904712bca67799ce1417dd1e60d925822ffbab7d45e5f232c74efb1f8d7b1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD1 22920 bytes
font_01_sfnt_off00006035.bin
98ac4e66809d5f1f5b8246c3389f99af71150df64b93ee4f4ebb1a2fd2e53783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 18152 bytes

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