Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ec21cea7c5a294…

MALICIOUS

PDF

40.4 KB Created: 2021-04-28 22:38:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d1b9751316f29c6853472f801d8fb759 SHA-1: 51a97d5ea61fb5c77fcc38c25492ae1107704931 SHA-256: d6ec21cea7c5a294af7478d78d6157317d0b30e4c080b6acf32d6bb5ab832238
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document employs social engineering tactics, presenting itself as a "game hack" or "generator" to trick users into installing a fake browser extension. It also instructs users to provide a password for an archive, likely to bypass security scanning. The document contains multiple links to external websites, with the primary one being `https://netcdn.xyz/app/431946152/best-admin-hack-roblox-game-hack`, which likely serves as the initial download or redirection point for a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/best-admin-hack-roblox-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/roblox-how-to-get-free-obc.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/comment-cheat-sur-roblox-jailbreak.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/dexode-hack-to-survive-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/descargar-superspeed-hack-roblox-deathrun.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pastebin-free-items-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-roblox-script-no-viros.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-roblox-with-v3rmillion.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-roblox-on-ios.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-rewards-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-2021-february.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_off00003df6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DF6 26256 bytes
SHA-256: aeffe7baae96569492a6c82b6101327c9b0069db63135deb9328d435a7e671e3
font_01_sfnt_off00007a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A80 18840 bytes
SHA-256: d867a538fbb60b3b794b0f18070606a3851c6446e9c7c07de68b38470b01fa3f

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