Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c29082b8001aba3…

MALICIOUS

PDF

40.3 KB Created: 2021-04-24 03:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ef8f4fc644ab7e3ac8fd713eece6b2f SHA-1: 5637fc2914d14cea44f9e8ea1bef28cdea158636 SHA-256: 0c29082b8001aba3519840fdbaca305c826b0c2bed4b74c4405ad0c6ef6ff93b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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://netsecure.top/app/431946152/free-robux-scam-copy-and-paste-game-hack PDF link annotation
    • http://blueduna.com/images/roblox-cb-ro-hack.pdfIn PDF document text
    • http://blueduna.com/images/4-million-robux-free.pdfIn PDF document text
    • http://blueduna.com/images/games-in-roblox-to-get-free-robux.pdfIn PDF document text
    • http://blueduna.com/images/builders-club-hack-download-roblox.pdfIn PDF document text
    • http://blueduna.com/images/best-roblox-dll-hack.pdfIn PDF document text
    • http://blueduna.com/images/free-rolls-hack-elemental-wars-roblox.pdfIn PDF document text
    • http://blueduna.com/images/can-you-give-me-robux-for-free.pdfIn PDF document text
    • http://blueduna.com/images/hack-bighead-simulator-roblox.pdfIn PDF document text
    • http://blueduna.com/images/free-roblox-no-verification.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-free-headphones-in-roblox.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_off00003f0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F0E 25444 bytes
SHA-256: 1d35fd27dbd372e362d29f6780bce3ed610dd72a9ce1f702982e558599edd4d6
font_01_sfnt_off000078b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 19292 bytes
SHA-256: 1c65d74ab6cbb77dbf685ecde914e00cbf3de48375ba116a8c3f6ddf72f51f6e

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