Malicious PDF — malware analysis report

Static analysis result for SHA-256 347c0b0e9df4c0c3…

MALICIOUS

PDF

56.9 KB Created: 2021-05-12 05:52:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 90d240eb8afaf398c0883478ed870ec2 SHA-1: da337601623370e8e4624337eec3afe4cc5f0b29 SHA-256: 347c0b0e9df4c0c3a3558aee430c97d3e3fbcd56a78d5d8e0eefadc843767a57
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URLs, such as 'https://netcdn.xyz/app/431946152/free-roblox-dominus-game-hack', likely lead to the download of a second-stage payload. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7726

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-roblox-dominus-game-hack PDF link annotation
    • https://bwsrubber.com/image/data/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB7 27184 bytes
SHA-256: 1d047145e1c89dcd2af23eddfbf5156f6ed7fd89e1327ef8de86324b362bbb3a
font_01_sfnt_off000086fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FA 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off0000aed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED2 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000bb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7A 18636 bytes
SHA-256: 2be0a1fc4ee774232c55e444dc6b2496869834729b438f6f5b1549b2be4e0f34

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