Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ec77bc3cb78e34…

MALICIOUS

PDF

47.4 KB Created: 2021-05-16 02:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc329a48b3b8b56a11040266ee8cda9f SHA-1: 9e7e88186a541b87d2bb8f5666326aae7b66a61a SHA-256: 62ec77bc3cb78e3432fdd74c2939ee8bcd78c8bd952048523b090ec18ac82a73
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This link, 'https://netcdn.xyz/app/431946152/free-robux-no-anti-bot-verification-game-hack', likely leads to the download of a second-stage malicious payload. The presence of multiple similar URLs suggests a campaign focused on distributing potentially unwanted or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/free-robux-no-anti-bot-verification-game-hack
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-2021_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/hack-para-coin-master-singapore_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/robuxglobalcom_GM431946152.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/minecraft-112-2-hacked-client_GM479516143.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-flip-master_GM406889139.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/youtube-how-to-get-free-robux_GM431946152.pdf
    • https://elearning.man2nganjuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-fb_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f89.bin
38fd37083ac511a0d1900ffa2ba5200fc4697b4465a9fbcc4f6ef25e3aa259eb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F89 25956 bytes
font_01_sfnt_off00008bae.bin
4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAE 2816 bytes
font_02_sfnt_off000095be.bin
8cfd8c2479ee29cd4f6dba9b0ab7f96f8a0f4a4bb194f6119df547073888af7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BE 18600 bytes

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