Malicious PDF — malware analysis report

Static analysis result for SHA-256 998970de84180575…

MALICIOUS

PDF

40.4 KB Created: 2021-04-29 10:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 52b86f61a715f4b908d64bf8356fe4b2 SHA-1: 7122cd65f84722e6ddcfad9563a456e439f7bcd6 SHA-256: 998970de84180575caf5ded776f1a2a18a784f4c2febce6cda414c1a347c5a77
82 Risk Score

Malware Insights

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

The PDF document contains a lure for "Free Roblox Vip Sever" and impersonates Microsoft, directing users to click a link hosted on a non-Microsoft domain. This strongly suggests a credential phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to lead to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • 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.xyz/app/431946152/free-roblox-vip-sever-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.xyz/app/431946152/free-roblox-vip-sever-game-hack PDF link annotation
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-ohne-verify.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-t-oget-ant-free-robux-item.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-admin-hack-2021-november.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-no-scams-2021.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-generator-unblocked.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/cb-ro-roblox-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/shirt-roblox-2021-free-dowload-transparent.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-hack-2021-no-human-verification-no-download.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/imperium-roblox-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/hack-roblox-vehicle-simulator-2021.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_off000040d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40D5 26352 bytes
SHA-256: 8edaa16be3abe12f83d2e1ef591f67cda1c9eb5f6e6e70621c6799b2b843859b
font_01_sfnt_off00007b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7E 18492 bytes
SHA-256: ea920317d08d16cf3c0b98a1d2913c842b2016106d496502015b874987661920

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