Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48fae50e2518db3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 04:20:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 624e923f49a1515ceddcc008e4e5d26d SHA-1: 0c1c66e29b58c079a82ba25e28acd326f7d992bf SHA-256: f48fae50e2518db3e375be23cfbc336855c7fe2c899b92d5880e3ab7c159e26b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to websites offering 'free Robux' or game hacks. The primary URL, http://netcdn.tw/app/431946152/free-robux-easy-game-hack, is flagged as a lure for game hacks. This suggests the document is designed to trick users into visiting potentially malicious sites that may host further malware or phishing content. No scripts were extracted, but the PDF structure and embedded URIs indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-easy-game-hack PDF link annotation
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-generator-without-survey_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-roblox-com_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/10-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-cute-girl-outfits-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-2021-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/hack-generator-robux-sans-verification-humaine_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/hacking-roblox-non-fe_GM431946152.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_off00003199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3199 22324 bytes
SHA-256: 5016db9a176d419f78ba316a956a1f4f894161da45f28171aae24ef0bd952eba
font_01_sfnt_off0000631c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 18896 bytes
SHA-256: 08474bdc287d3651cd8985bef3354d1e01eac2de28e8a43cfa13c093cfea4674

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