Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d49f9affbbd0f14…

MALICIOUS

PDF

40.3 KB Created: 2021-05-21 08:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9901321a6004023639ff5d0e441604a3 SHA-1: 7c8e44ec3981c51ea399d6b0f3a90fc5dbc455a4 SHA-256: 0d49f9affbbd0f14de635047be96ff26ddd6c12aaf72404a25215475e93e1661
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds external URIs and links to various domains, suggesting an attempt to redirect the user to a site that likely hosts a secondary payload or phishing content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7768

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/431946152/free-robux-generator-no-human-verification-2021-game-hack
    • http://uctaren.eu/images/optifine-mcpe_GM479516143.pdf
    • http://uctaren.eu/images/500-free-spins-coin-master_GM406889139.pdf
    • http://uctaren.eu/images/coin-master-rewards_GM406889139.pdf
    • http://uctaren.eu/images/coin-master-100-spin-hack_GM406889139.pdf
    • http://uctaren.eu/images/coin-master-hack-8-ball-pool_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033b6.bin
7d2574fad7edf0916ccbc2bbd57ea6cd52275378c6d167fe614d2a4f9e2917c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33B6 24844 bytes
font_01_sfnt_off00006cb8.bin
608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 3608 bytes
font_02_sfnt_off0000793f.bin
cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 19260 bytes

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