Malicious PDF — malware analysis report

Static analysis result for SHA-256 26abab294327883c…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 09:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5448a6d72949538492e1015acc878d45 SHA-1: 1b44295d08a08b9337fc267b2b7a4282ed468bbd SHA-256: 26abab294327883c0530f24499dcf5193e001d6c0c0b13f8d1a67bf45e5f5f1d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The document presents a fake CAPTCHA and impersonates Microsoft to trick users into clicking a malicious link, which is a common credential phishing or malware distribution tactic. The embedded URL, https://netcdn.tw/app/431946152/how-to-get-free-stuff-from-roblox-catalog-game-hack, is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-get-free-stuff-from-roblox-catalog-game-hack.
  • 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.tw/app/431946152/how-to-get-free-stuff-from-roblox-catalog-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-phantom-forces-mod-free-weapons_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-cheat-engine-2021-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-exe-editor-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-a-free-vip-server-on-roblox-jailbreak_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
stream_004_off000052c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C4 25308 bytes
SHA-256: 0fadb430157cb01ed8555318b92a3646a59fab22549aebf6bb5b3f606772968e
font_01_sfnt_off00008d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 19132 bytes
SHA-256: fe2abd82451458eb1b6aa22c6195dfdb8a17413cd4ca94122344e272d81e578f

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