Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd06467c7d11419c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 04:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8b76e4ebd275d313c5ebc27e138c7cb8 SHA-1: 50731322e9994e58732e13bfdb765fa22e4ae320 SHA-256: cd06467c7d11419ca930c4eb4a197d4450794b7e75794a9245d3ee06f8140591
82 Risk Score

Malware Insights

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

The sample presents a fake CAPTCHA to trick users into interacting with a malicious link. The embedded URL, 'https://netcdn.xyz/app/406889139/coin-master-claim-free-spins-game-hack', is likely intended to lead to a secondary payload download. 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-claim-free-spins-game-hack PDF link annotation
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/wurst-18_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.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_off00004cf5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF5 24916 bytes
SHA-256: 42ecb629e2116b21f2ccd987d9893866e6fe575737e34fda7f1f81bd64802f35
font_01_sfnt_off0000850b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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