Malicious PDF — malware analysis report

Static analysis result for SHA-256 f961c98e22b50345…

MALICIOUS

PDF

42.1 KB Created: 2021-05-15 00:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1bee850c57d13f831c7142caaf6b65b6 SHA-1: 35c50a44cb7f6b42f4094c02862f65d8ab324e62 SHA-256: f961c98e22b503458d0c0b64d709c668d5392e90bf0ba8ee3043ca1a3461d090
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA, a common lure to trick users into clicking malicious links. The embedded URLs point to domains associated with distributing potentially unwanted or malicious content, such as game hacks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-robux-hacker-us-game-hack
    • http://safetin.ru/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://safetin.ru/images/send-me-500-2021-spins_GM406889139.pdf
    • http://safetin.ru/images/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://safetin.ru/images/free-private-server-roblox_GM431946152.pdf
    • http://safetin.ru/images/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://safetin.ru/images/moonactive-free-spins_GM406889139.pdf
    • http://safetin.ru/images/roblox-army-free-robux_GM431946152.pdf
    • http://safetin.ru/images/hack-coin-master-download_GM406889139.pdf
    • http://safetin.ru/images/free-spins-and-coins-com_GM406889139.pdf
    • http://safetin.ru/images/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://safetin.ru/images/websites-that-give-free-robux_GM431946152.pdf
    • http://safetin.ru/images/play-roblox-free-online_GM431946152.pdf
    • http://safetin.ru/images/free-robux-generator-for-kids_GM431946152.pdf
    • http://safetin.ru/images/spin-coin-master-free_GM406889139.pdf
    • http://safetin.ru/images/minecraft-bedrock-free_GM479516143.pdf
    • http://safetin.ru/images/free-coin-master-generator_GM406889139.pdf
    • http://safetin.ru/images/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://safetin.ru/images/free-robux-promo-codes_GM431946152.pdf
    • http://safetin.ru/images/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://safetin.ru/images/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046aa.bin
a4926e9214b5f0fecd1ad960c420e0f0095b15429be3250e3fd9f95214cf0a56		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46AA 25512 bytes
font_01_sfnt_off0000812c.bin
be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 18600 bytes

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