Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f4d6dc9c26a55e…

MALICIOUS

PDF

43.8 KB Created: 2021-04-24 15:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e150e457908af6e0363e7c8c5615f7fc SHA-1: 60df343b2a6cb2e42bf80737f63ae61ba4af78cd SHA-256: b2f4d6dc9c26a55e41fb79b084115eaff3d25b163dcfbac9382d8c8a51772387
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to Roblox game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing 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/join-the-group-for-a-free-sword-roblox-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-code-on-how-to-get-clothes-for-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hacks-on-robloxs.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/get-50-00-robux-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/claim-free-robux-com.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-admin-commands-roblox-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-hack-gir-on-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/reversal-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-become-hacker-in-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/get-free-robux-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-pastebin-hack-no-waiting.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_off00003fbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FBE 25388 bytes
SHA-256: e8c1f23d17a17f011e68e26ad420742f599b9f9e79e8c2c385ed118f7e1fe65b
font_01_sfnt_off00007a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A57 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000086ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FF 19056 bytes
SHA-256: 8c11de151563e8ba72df8c17b21610afc062910a49790ff3dece27ac36f6c687

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