Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ba89e4b582ecb8…

MALICIOUS

PDF

43.9 KB Created: 2021-04-25 18:41:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bf9f4ea5ef0cd8566744928bfd2f16c9 SHA-1: 54f3767372ecfad4ed50a8a27ef85fef699aa115 SHA-256: c3ba89e4b582ecb8ac9320a8bd2cd6bf25c073a96d8f8d51a9be962b31438457
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/my-roblox-account-was-hacked-what-do-i-do-game-hack PDF link annotation
    • http://perpustakaan.saburai.ac.id/repository/como-descargar-hack-para-matar-en-roblox.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/free-sdcript-executer-for-roblox.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/roblox-ultimate-driving-cheat.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/free-robux-cheat-2021.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/free-roblox-privet-strucid-servers.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/hack-de-roblox-para-atravesar-cosas-facilmente.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/assassin-roblox-cheats.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/free-robux-youtube-denis.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/www-get-free-robux-com.pdfIn PDF document text
    • http://perpustakaan.saburai.ac.id/repository/descargar-hack-pc-robux.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
stream_003_off00003f96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F96 25760 bytes
SHA-256: f66675f4ca077050c113ba1a73083e720a04ac7827191597275815d8caeb120c
font_01_sfnt_off000078f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F9 3936 bytes
SHA-256: 56f91d12f1fd26ee93de517f09e63ae86dd2fe155f74f5627c9f6637d22945ea
font_02_sfnt_off000085e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E5 19508 bytes
SHA-256: ca27fffb1e87daa10752497cb72a095863c95475bc25d40470cbb9c0b1d9710c

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