Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddfa83b4ba8407f…

MALICIOUS

PDF

36.1 KB Created: 2021-05-24 06:16:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 74224359e8eeac4070f2b3a3e3ab9236 SHA-1: 9d40248c0018207c5cba1a3b1f3a1985aeafc24c SHA-256: 7ddfa83b4ba8407f2b5fa724263347715f6fc2d1a061233dc6f72658b52193d8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and visual cues like a download button, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body and embedded links point towards lures for game hacks (e.g., Roblox, Coin Master), indicating a likely attempt to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of external links and lures suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/431946152/roblox-land-free-robux-game-hack
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-infinite-robux_GM431946152.pdf
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-hack-spins_GM406889139.pdf
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-a-free-pokemon-go-account_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003173.bin
f727e20ef7577c5ad1c225d5a55675e850ac7911fea387f6c6e569df0f8e976d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3173 25752 bytes
font_01_sfnt_off00006b24.bin
dd1922fe1cc281356c7e312f91778e191ebdc244bf13f8823862483f595251c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 18492 bytes

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