Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea98df0d99b8ea52…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 00:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 73b4d31edce2be86dcd5f2ddf0354e67 SHA-1: f8a071f5fc24de23456e0afb470ca2b7b0dcc93e SHA-256: ea98df0d99b8ea52c39033fc3a4fee865eee6275a5d436194298edc5b13f20e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure to trick users into downloading malicious content, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It also embeds external URLs pointing to potential malware download sites, such as 'https://netcdn.xyz/app/406889139/coin-master-hack-software-game-hack'. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest an attempt to exploit users into executing further malicious code, likely via a downloaded second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-hack-software-game-hack PDF link annotation
    • http://xenonsvjetla.com/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/mcpe_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 25548 bytes
SHA-256: a2a7f4ea2f67aa8dd8286dcf955fc9a9a777d1c89f752737965227fbc09707db
font_01_sfnt_off000082ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82ED 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D07 17880 bytes
SHA-256: 544f43ea8445c04f90b32bb89fa74997ce853b2370fee25cb972ddebb18b4158

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