Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fc705b29a0eec8…

MALICIOUS

PDF

42.0 KB Created: 2021-04-25 18:59:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cce89cae4bbdc7a52135442d54605dca SHA-1: 863bb9c07b7bee8e732548b6f4e8a79087614ac9 SHA-256: 89fc705b29a0eec84726ded72954fff35bd5529f0246a3914685b18d71679c86
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting Roblox users. The document body and extracted URLs reinforce this lure, directing users to potentially malicious sites. The presence of a 'password-protected archive' lure suggests an attempt to bypass security controls by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • 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 https://netcdn.xyz/app/431946152/www-roblox-com-robux-free-download-no-surveys-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/free-robux-information.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-gamepass-in-roblox-with-cheat-engine.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacking-brothers-roblox-account.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-robux-items-for-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/aim-hacks-for-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-free-robux-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-do-you-get-free-money-in-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-my-roblox-account-freee-no-downloads.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-robux-pastebincom.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-jailbreak-airdrop-spawn-hack.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
stream_003_off000043c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43C9 25868 bytes
SHA-256: 465fb617984c7c66360fcf5eb5ac463b25edd0a6859202ba5930e8c734e4957e
font_01_sfnt_off00007eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB1 19576 bytes
SHA-256: c77bc09b286666646089ae7120e1f0bfc8078a6e5558c0e74a06fc463a34c00e

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