Malicious PDF — malware analysis report

Static analysis result for SHA-256 1352ac6392d34d77…

MALICIOUS

PDF

38.9 KB Created: 2021-05-24 04:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 85ffa32b2b3999b265b0f81d22b98c12 SHA-1: e8ffbe4a171930bda76d180028bd84d246afbbf8 SHA-256: 1352ac6392d34d779dab841103359bc8a55bcf067ff4e31eebedae15d4d157f4
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA and includes text referencing 'Free Coin Master Spins And Coins' along with a call-to-action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. This strongly suggests a social engineering lure to trick users into clicking embedded malicious links. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/free-coin-master-spins-and-coins-game-hack
    • http://spstrading-th.com/images/roblox-free-no-download_GM431946152.pdf
    • http://spstrading-th.com/images/is-roblox-free-on-pc_GM431946152.pdf
    • http://spstrading-th.com/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://spstrading-th.com/images/free-minecraft-account-and-password_GM479516143.pdf
    • http://spstrading-th.com/images/coin-master-free-card-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034df.bin
75ccd21fbfcfddcbfb1da6608e795b1a6359ce2718a8482fa73fcdc403604a19		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DF 25436 bytes
font_01_sfnt_off00006daa.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAA 2824 bytes
font_02_sfnt_off0000774d.bin
55f53c4f18bfaf59a8fbb6d381f980c96a3f4ad908aa3278e43a985984e68094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774D 18060 bytes

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