Malicious PDF — malware analysis report

Static analysis result for SHA-256 7147097bc620185f…

MALICIOUS

PDF

32.6 KB Created: 2021-07-22 06:07:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae2d7644013f0b9528e41e4c7e828fed SHA-1: e11bd09015d65c2103fa0c4afd85676c0d807ed6 SHA-256: 7147097bc620185ffedb67fc24b75d6d6c7102f255401228b59b8f42304e885b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by an ML classifier and exhibits characteristics of a fake CAPTCHA lure, aiming to trick users into interacting with malicious links. The document contains multiple embedded URLs, including one pointing to 'netcdn.tw', which likely serves as a download or redirection point for a second-stage payload. No scripts were extracted, but the presence of embedded links and the fake CAPTCHA heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/479516143/minecraft-bedrock-edition-free-game-hack
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-tiktok-followers-app_GM835599320.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-coins-coin-master_GM406889139.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-followers_GM835599320.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-spins-coins-coin-master_GM406889139.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/minecraft-pocket-edition-free_GM479516143.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/minecraft-marketplace-free_GM479516143.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-minecraft-worlds_GM479516143.pdf
    • http://www.ttithimphu.bt/wp-content/uploads/fsqm-files/free-robux-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c41.bin
a212936bcc6e034aecacdae0668af34ec8dea86262781ab407887a0e5fe51be0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C41 22284 bytes
font_01_sfnt_off00005d79.bin
0b29718dce26c4d1fb8eff562362f22d55d4276ac23c5c88aa1b07f7376859fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 18268 bytes

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