Malicious PDF — malware analysis report

Static analysis result for SHA-256 34233eebab5547d8…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 17:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7b15e190c70efe28b3845b8386073872 SHA-1: d146de20d6aa556413e01e907a57d568570b9fc9 SHA-256: 34233eebab5547d8482de33eed93f99868d19857ec725ed736bd28da2c06a60e
82 Risk Score

Malware Insights

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

The document presents itself as a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URL http://netcdn.co/app/431946152/john-doe-hacked-roblox-game-hack likely leads to a second-stage payload download. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/john-doe-hacked-roblox-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-radio-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/inject-hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/pubg-uc-top-up_GM1330123889.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-vip-server-for-roblox-gravity-shift_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/tiktok-free-movies-site_GM835599320.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-works-in-an-hour-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-survey-no-download-no-offers_GM431946152.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
font_00_sfnt_off000030a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A2 23484 bytes
SHA-256: 58a0764b66247c86ce209d985da580cecd3b00efcd9ffae6a84046f6ec1dc09c
font_01_sfnt_off00006519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 19332 bytes
SHA-256: 880d8b356becd80052ee45cd87460cc996f2c7fe94cff8844143fff0c367f2e5

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