Malicious PDF — malware analysis report

Static analysis result for SHA-256 195f3f2573f4152a…

MALICIOUS

PDF

37.2 KB Created: 2021-05-21 05:55:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6da2c094e20c8b3e640821f865408cb6 SHA-1: 51a332103b5d7d81d4db9fe37f631967ba19b8e3 SHA-256: 195f3f2573f4152a0d97ea8cc6d36e0be029be824910578df706ff64573cc2fa
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA and a call-to-action to lure users into clicking a link for 'free Robux'. This is a common social engineering tactic to trick users into downloading malicious files or visiting compromised websites. The embedded URLs point to suspicious domains, further indicating a malicious intent to distribute potentially unwanted or harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-no-verify-2021-game-hack PDF link annotation
    • http://ines.co.rs/images/free-coins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34F1 25004 bytes
SHA-256: ddf0ddb9f2be85a9af5618ba370bd68dbc388bb8ac6c02af5811dda944232a89
font_01_sfnt_off00006e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5E 18848 bytes
SHA-256: 9f147bd5bf62c652754f553854fad05fac0b8df637ce3021f80b740c61e7be7f

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