Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdf5901c280680f…

MALICIOUS

PDF

40.0 KB Created: 2021-05-20 13:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 289b398d8bfe251e6ffbcd8d550d7d8f SHA-1: 2228d7cf50d33a9c2364a63960308ec64f5faa1f SHA-256: 2fdf5901c280680f6480cc13be67c7b093d37994697a0411274b43c20c8832a6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains embedded URLs and document body text that explicitly mention 'Free Robux' and 'Amazon', indicating a brand impersonation lure. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' confirms this, noting that the linked domain 'netcdn.xyz' does not match the impersonated brand. The presence of multiple related URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-without-human-verification-real-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-without-human-verification-real-game-hack PDF link annotation
    • https://i-tech.ac.id/perpus/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/javascript-free-robux_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
font_00_sfnt_off000033b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B8 24924 bytes
SHA-256: 39ee9167a67b013adecf65606ca34ba1ea47f8922a844ac1c2790c5e80092f0d
font_01_sfnt_off00006cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 3196 bytes
SHA-256: 5966aea3ac94e9fb1308fe85ff33dc721375542eaf7bb18668bee203e37abcfc
font_02_sfnt_off000077d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D9 19296 bytes
SHA-256: fcd37aae12381262441149b3f055c838aea0a99c045645b338d4096dcdd54a9c

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