Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1d7cc8aed46775…

MALICIOUS

PDF

43.8 KB Created: 2021-04-29 08:26:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7bdcbd4d80bd9155ad949925746b284f SHA-1: b96496842769fcdfaf772d20e848ba9c1b0419b5 SHA-256: 3e1d7cc8aed46775d17bd89df16072d9c54856ee0bffc59e8493218cb3ce8fe8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure, directing users to websites offering game hacks and cheats for Roblox. The primary link, https://netcdn.xyz/app/431946152/silent-assassin-cheats-roblox-game-hack, is flagged as a high-risk lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to trick users into downloading potentially malicious files or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/silent-assassin-cheats-roblox-game-hack PDF link annotation
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-roblox-hackeado-para-pc.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-xbox-one-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-free-girl-clothes.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/get-a-free-promo-codes-for-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-roblox-card-code-generator.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/robux-hack-no-download-or-human-verification.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-hack-de-jailbreak-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/hacking-my-roomates-roblox-account.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-how-to-get-free-hats.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-hack-pc-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000043de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43DE 26172 bytes
SHA-256: 7a8ecb53fd25fc98cb3de24f603bc317aa128d2afc30e6d6fa923cbc71c6ad04
font_01_sfnt_off00007f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8916 18404 bytes
SHA-256: c455c79713462d06de7bbafc9e893899f2053e5e9abdca95c0a2666bc55dbada

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