Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f330f980b80381…

MALICIOUS

PDF

39.8 KB Created: 2021-04-23 13:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0a22e90ea16b93c050fa3710ac27c107 SHA-1: 4f4c36e2eb22de902833f7d6ef38e716c81305b4 SHA-256: 51f330f980b80381d1a4d80e556b38abfa8d371735876ff99518990ce6022f93
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for 'free game hacks' related to Roblox, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.top/app/431946152/free-group-roblox-game-hack PDF link annotation
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/how-to-get-a-free-skateboard-on-roblox.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/where-in-roblox-can-i-find-free-gems.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/odyssey-roblox-hack.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/hack-jailbreak-roblox-2021-menu.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/free-wallpapers-for-roblox.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/hacking-terminal-for-roblox.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/hoow-to-get-robux-no-hacks.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/bit-slicer-roblox-all-hacks.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/download-games-for-free-roblox.pdfIn PDF document text
    • https://www.dmgroupksa.com/uploaded_files/userfiles/files/roblox-girl-pants-free.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
font_00_sfnt_off0000416b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x416B 25280 bytes
SHA-256: e48b29e15a468a10e775f83bf1ab979ce149a8f90707504a3cf44b7d199fe6d6
font_01_sfnt_off000079a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 18264 bytes
SHA-256: 31cc93a5829e223d58b1b30bfb51d13dea7d7899258fccbb6445770557a8d4bf

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