Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed85f5aba91ded46…

MALICIOUS

PDF

40.9 KB Created: 2021-05-21 23:46:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9cb1137440c7c910cc88377bb74eac79 SHA-1: cc72caa81ce13cd3241e1bcc69f88a53cbfc5cc2 SHA-256: ed85f5aba91ded467eb8d876f2d8cd7dc63e2218149178e83a52a13309030ca3
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 Robux' and impersonates a brand to trick users into clicking a malicious URL. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-redeem-codes-game-hack, is presented as a 'Roblox Generator'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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-robux-redeem-codes-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-robux-redeem-codes-game-hack PDF link annotation
    • http://practicaltech.com/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/free-rare-cards-for-coin-master_GM406889139.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
font_00_sfnt_off0000351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x351F 27584 bytes
SHA-256: 184e10b51c30778c8a6ffc7bbbac1ecf2dd93160e975fe45bade264766aa03db
font_01_sfnt_off00007462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7462 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00007e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E19 18448 bytes
SHA-256: ac1fbd71dc65d7a5013a2beb110170fe519d7ae17df877d161357825f85fd2ae

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