Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ff4797ecfd55aa…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 04:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a851221924e54cb8fae4821b0ebdff03 SHA-1: 5b171a81326d0cda896ee3b2520739fa36046816 SHA-256: a2ff4797ecfd55aabf9aaa66df226adef09dcc9767a77f551ca5d2e84df74894
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into downloading a malicious application from the provided URL. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests a download attempt. While no scripts were explicitly extracted, the PDF format and the nature of the lure imply potential for embedded JavaScript to facilitate the download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/835599320/vpn-for-tiktok-free-game-hack
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-free-codes_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/113-hacked-client_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-hack-online-pc_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-roblox-hair-girl_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/optifine-mcpe_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/roblox-exploit-scripts_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-redeem-code-free_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-get-free-robux-games_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-script-executor-roblox_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/robux-hacks-2021_GM431946152.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/master-coin-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004875.bin
f377118b5716339b9e6df812f8c878350b77cd49eed5e6872f2fb6b4349c8b01		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4875 28704 bytes
font_01_sfnt_off00008880.bin
93d63b68c41061d75a1ffbce6128cc9380b3226d9ec249bf7b45467270981c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8880 17764 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.