Malicious PDF — malware analysis report

Static analysis result for SHA-256 0327b76b4e5c7d29…

MALICIOUS

PDF

41.9 KB Created: 2021-04-29 16:39:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 567960d0aa238d53a100539501756e97 SHA-1: 5ac8adbd4b4519f9084197db24aa10f50347ef5e SHA-256: 0327b76b4e5c7d29f550986feef98f4c12c10a9aa6de7c6ada19a2708a68fcec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'free generator / game hack' content for Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/promocodes-roblox-free-game-hack PDF link annotation
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/hack-peoples-account-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-access-the-studio-of-a-roblox-game-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-hack-into-a-roblox-account-2021.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-ohne-verify.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-x-ray-hack-autohotkey.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/imperium-roblox-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-easy-ways-to-get-robux.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-robux-free-no-password.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/shirt-ash-on-roblox-free-on-shirt.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-raps-for-outo-rap-batils-for-roblox.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_off000040db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40DB 28764 bytes
SHA-256: d397f98c31be6733442e9728c4a360bfdff9329532c3b4623119dec6a00aa9bc
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 18536 bytes
SHA-256: 15ed8859c4128a2fcb6baa7652d26e7d64668db53a0257beeb553be0235fb491

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