Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f78b6200251027…

MALICIOUS

PDF

39.7 KB Created: 2021-04-30 04:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a9aa1cafc7ebb145f4e895e6f6f12111 SHA-1: 41bc12431533bce2526d0a6dd3617364166da90d SHA-256: 08f78b620025102735df4c9758be715b92d90d0a744f1ae3cdb84e67fa92a1ca
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary malicious link identified is https://netcdn.xyz/app/431946152/free-unused-robux-codes-2021-game-hack, which likely leads to a malicious website. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and link.

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/free-unused-robux-codes-2021-game-hack PDF link annotation
    • http://www.bibliotecadiurbisaglia.it/repository/best-jailbreak-hacks-roblox.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/script-for-cheat-engine-roblox.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/alone-free-money-roblox.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/how-to-make-a-free-roblox-account.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/how-to-get-free-robux-2021-no-human-verification-pc.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/free-account-in-roblox-real.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/cheat-roblox-dungeon-quest.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/free-roblox-pin-t-shirt.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/how-to-hack-into-any-ones-account-roblox.pdfIn PDF document text
    • http://www.bibliotecadiurbisaglia.it/repository/free-robux-app-play-games-earn-robux.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_off00003e93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E93 25196 bytes
SHA-256: c3d3697835292e3d22a78b333448928a329bab878162c67fd67452b62e7510eb
font_01_sfnt_off000077cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CF 18776 bytes
SHA-256: 259a6c09608e63394a9eb3ee6fe3afca2844db5efbec25014e35555692a6970e

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