Malicious PDF — malware analysis report

Static analysis result for SHA-256 276396a7b4959af8…

MALICIOUS

PDF

41.0 KB Created: 2021-04-22 21:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d4a4d6cb88cf9b8c8e62efc18ce4b6ef SHA-1: 961cead0f06383c29e6da55e2b2f0d72d8af645c SHA-256: 276396a7b4959af840be0b3a3b22cdd604dbfa715a1dc432640b87f8e249d09c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to game hacks and cheats, specifically for Roblox. The primary link directs users to a site offering a 'free mod menu', which is a common social engineering tactic to entice users to download malicious files or visit compromised sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://netsecure.pro/app/431946152/free-mod-menu-for-roblox-game-hack PDF link annotation
    • https://sitecontabil.com.br/ckfinder/userfiles/files/cool-free-roblox-skins.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-hack-online-generator.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/horizon-in-roblox-money-hack.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-robux-2021-ios-no-human-verification.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/unlimited-jump-hack-roblox.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-roblox-coins-for-free.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-person-with-free-hoodie.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_off000041a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41A2 26896 bytes
SHA-256: 60932bdfd9ab2cb532b1cf9cea8bb0b14259f59288dd76135bc8b3d6b6857b42
font_01_sfnt_off00007e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E08 18460 bytes
SHA-256: 3d1710454ff5792687ba7484e6f6af22295203975794890919ecb94fb6f08159

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