Malicious PDF — malware analysis report

Static analysis result for SHA-256 0946d8c8cc485dae…

MALICIOUS

PDF

41.4 KB Created: 2021-04-27 16:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0fe58c245e68059c9cc4a1e07fcd4470 SHA-1: 06ccb2a52c525b3553b816535bc074609c509e5a SHA-256: 0946d8c8cc485dae21e5ed20babb208591ef6f762898163217371bd17b318d6d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a 'free Robux generator' lure, which is a common tactic for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs indicate an attempt to redirect the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/how-to-get-free-robux-easy-2021-pc-game-hack PDF link annotation
    • http://opac.library.uib.ac.id/repository/how-to-buy-clothes-in-roblox-xbox-1-free.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-com-free.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/azon-hack-roblox.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/como-hackear-una-cuenta-de-roblox-2021.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/codes-for-2021-november-for-free-robux.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-someones-account-on-roblox-easy.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-admin-hack-55-download.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-in-roblox-2021-on-computer.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/774-roblox-hack-2021.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-ninja-warrior-teleport-hack.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_off000042c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42C6 25812 bytes
SHA-256: af3196001e9138b64fc66e5bb197b1b9870374e0bb53d4b849bd7414a064bf79
font_01_sfnt_off00007d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0D 19244 bytes
SHA-256: ab9b504b77616c2996d0c41e594957a97bd514b7c59d5532c4286ad329aff4f3

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