Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef6e597a35e0109…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 02:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e6b4a7afd6e368ed5a65ee682ba042c4 SHA-1: c9f5efa810118bc958567d4399cb2a8ae5901f76 SHA-256: 8ef6e597a35e01098cda022cf221fb978dfc28c23080bfe302188788fe6b0a38
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'Free Robux' and 'game hacks', directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-robux-with-no-verification-game-hack PDF link annotation
    • http://felmerihomes.com.au/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://felmerihomes.com.au/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/how-do-you-get-roblox-for-free_GM431946152.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_002_off00003364.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3364 24824 bytes
SHA-256: dc4b65133cac50b6fbf49fb77eceb93ad39853e6dfd8db23ca926af9897858ad
font_01_sfnt_off00006c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 18964 bytes
SHA-256: 882e97bebd076dae688415b0184bb224dca7d5b64082a0b27c077a0c76cfc979

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