Malicious PDF — malware analysis report

Static analysis result for SHA-256 008327ddaa524dcf…

MALICIOUS

PDF

46.6 KB Created: 2021-06-10 11:53:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f8be4b259f041927c8d14cdf76b684c6 SHA-1: 55c4c74180740cca5da6340adda42dd1425af54b SHA-256: 008327ddaa524dcf281aae7462ef0285806b5032eaa9d1f528f9d1f1da6bb74d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into interacting with malicious links, as indicated by the SE_FAKE_CAPTCHA heuristic. The embedded URLs, such as https://netcdn.tw/app/431946152/free-roblox-phantom-forces-hack-game-hack, likely lead to further malicious content or scams. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes, potentially leading to client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/free-roblox-phantom-forces-hack-game-hack PDF link annotation
    • http://sv-nahetal.de/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-free-robux-limited-edition_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fc4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC4 24404 bytes
SHA-256: f784de00e170f8f9623b16102e2a04c5b9aa9bf1adbf7d6dc4b20bc8404a0415
font_01_sfnt_off00008781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8781 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00009143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9143 19028 bytes
SHA-256: e111bc19f713e9d4bdc2bd9b7d17a65484b74028aa5fc8d31a1b36c3979b74a3

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