Malicious PDF — malware analysis report

Static analysis result for SHA-256 9417fa7e469f6064…

MALICIOUS

PDF

44.3 KB Created: 2021-05-16 11:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b4519f1ed7992df263e087229956179f SHA-1: 1908e7177e683a4709acbff5c61b3eb6d86edc5e SHA-256: 9417fa7e469f6064ac25dd5ad8fe737d5cbfdd2b27cb8f75d4cf2ccc86d213e9
122 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA and includes a call-to-action button, strongly suggesting a lure to trick the user into downloading a payload. The presence of external URLs, including one pointing to a potential exploit or download page, further supports this. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to facilitate the download and execution of a second-stage malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-do-you-get-free-robux-without-paying-game-hack PDF link annotation
    • https://enpav.it/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://enpav.it/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://enpav.it/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://enpav.it/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://enpav.it/images/how-to-download-minecraft-for-free-on-your-phone_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_off00004b31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B31 25344 bytes
SHA-256: 01ba80dd5cb489154fe58a6318ba85ad492c6d24e75b53fc807bfa7f26f2ead5
font_01_sfnt_off0000862c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862C 19948 bytes
SHA-256: 5d1001e3ac77277796354ae1628373f4f4a3ba3fa344903a86c4555bafe1b783

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