Malicious PDF — malware analysis report

Static analysis result for SHA-256 45245ef331b4f56c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 20:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f161547e7c08cfd8616cea35d56db344 SHA-1: 8868b807ed748034155fa5d35deacbb1dcbfd6d5 SHA-256: 45245ef331b4f56c0fa53ceaf3fcb2d73b274ad58892584da0fb1db2d2d0dea8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document uses a lure related to free Robux and game hacks to entice users. It contains an external URI pointing to a suspicious domain, likely serving a malicious payload. The presence of a password archive lure suggests an attempt to bypass security controls by encrypting the payload. Although no scripts were explicitly extracted, the ML classifier strongly indicates malicious intent, likely involving a downloader or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/how-to-get-free-outrageous-and-robux-earrapr-game-hack PDF link annotation
    • https://perpustakaan.smp1madiun.sch.id/repository/free-roblox-script-obfuscator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/hack-roblox-account-passwords_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-items-in-roblox-today-ultra-rare-and-new_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-coloring-sheets-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/pc-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/hack-camisetas-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-hack-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-tango-face-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/www-robux-hacker-co_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/speed-hack-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/hacks-robux-apk_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-uc-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-hacks-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/the-most-opiest-script-hack-in-roblox_GM431946152.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_off000030e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E4 21728 bytes
SHA-256: 4f32b24919c0f965c1192b8c9c15ac84bf72a5fd0e938e87487e5253981743a1
font_01_sfnt_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 19336 bytes
SHA-256: c8810635cc9859667f266aee26ca2222798f4d395f8542f2a9fc3888669c738f

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