Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa97c0fcf3ba64d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 12:34:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 19187f58ac666802df0240b59b03dcf4 SHA-1: 29a4b00d3bc6022c2abc241ccb3b26ee4c8454d8 SHA-256: efa97c0fcf3ba64d4ca67a8635bff2dffa66053dc3ceb663c6dfb80345191d7e
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 a link. The embedded URI points to a URL that appears to be related to game hacks, suggesting a social engineering attempt to download further malware. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-raid-hack-game-hack
    • https://heritagebanquethall.ca/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • https://heritagebanquethall.ca/images/coin-master-free-spins-hack-link_GM406889139.pdf
    • https://heritagebanquethall.ca/images/roblox-free-wings_GM431946152.pdf
    • https://heritagebanquethall.ca/images/ios-coin-master-hack_GM406889139.pdf
    • https://heritagebanquethall.ca/images/op-rewards-free-robux_GM431946152.pdf
    • https://heritagebanquethall.ca/images/free-robux-com-real_GM431946152.pdf
    • https://heritagebanquethall.ca/images/roblox-com-free_GM431946152.pdf
    • https://heritagebanquethall.ca/images/best-way-to-get-free-robux_GM431946152.pdf
    • https://heritagebanquethall.ca/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://heritagebanquethall.ca/images/coin-master-free-spin-game_GM406889139.pdf
    • https://heritagebanquethall.ca/images/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://heritagebanquethall.ca/images/com-roblox_GM431946152.pdf
    • https://heritagebanquethall.ca/images/free-robux-pastebin_GM431946152.pdf
    • https://heritagebanquethall.ca/images/get-roebucks-com_GM431946152.pdf
    • https://heritagebanquethall.ca/images/free-robux-that-actually-works-2021_GM431946152.pdf
    • https://heritagebanquethall.ca/images/500-free-coin-master-spins_GM406889139.pdf
    • https://heritagebanquethall.ca/images/claim-free-robux_GM431946152.pdf
    • https://heritagebanquethall.ca/images/roblox-robux-hack_GM431946152.pdf
    • https://heritagebanquethall.ca/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://heritagebanquethall.ca/images/how-do-you-get-free-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab9.bin
0adac9b611032676be99baa8f68c9a5465f349a6ebdd49715a7912b9f98faca2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB9 24364 bytes
font_01_sfnt_off000081c1.bin
3bcd7f88e9aff6a3f00dfa05e6d37dfcb1a17a5992fabfc54377b1f82d15f42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 17888 bytes

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