Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22fd5c089961bda…

MALICIOUS

PDF

41.0 KB Created: 2021-05-13 11:17:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 78c752c79668aae0e8ff9ff9c47f62cc SHA-1: a2391d9e0a50f299c7750c6dce20512e939a7c1d SHA-256: d22fd5c089961bdafc7876a67aa9d9dbecd09b59eefa2f94b466da3ad94dd823
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking malicious links. The embedded URLs point to external resources that likely host further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/static-moonactive-net-game-hack PDF link annotation
    • http://atmos-service.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/robux-game_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/20-free-spin-link-coin-master_GM406889139.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
stream_003_off00004711.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4711 24912 bytes
SHA-256: 73bea8a2cf268ec8f89908a4189843c9e239623462a5fac3776820a24e403c7b
font_01_sfnt_off00007fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 17660 bytes
SHA-256: 6b7ab008261f630dc22e15b5ef3c221448b4794aa8c3d363ebd414377ccf7e51

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