Malicious PDF — malware analysis report

Static analysis result for SHA-256 8742f759f17d5d61…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 04:13:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70427a8ee38efce8d8b25c2d35f9a693 SHA-1: 4b88059e6af749d941345ea640f41757c4ab298b SHA-256: 8742f759f17d5d6123d2f05842eb64d900f24ee836d16552ea43c4f006fa02c9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to 'free Robux' and game hacks, indicating a phishing or scam attempt. The primary malicious URL identified is http://netcdn.tw/app/431946152/get-free-robux-generator-game-hack. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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/get-free-robux-generator-game-hack PDF link annotation
    • http://lib.kesdammedan.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/1-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/2021-roblox-accounts-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/arsenal-roblox-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-ghost-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/new-roblox-hack-exploit-for-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/car-spawn-gui-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/robux-hack-2021-admin-codes_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-real-gift-cards-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-100-robux_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_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 21856 bytes
SHA-256: 87c1b833499697e1f6ae996a41a7d31a9f52ec95b2004890d4b2862ec66ac9e2
font_01_sfnt_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 18820 bytes
SHA-256: 3cf5f9b00a39f0cfcbee830171857ad484f6534b8809920e240be9eaf31d3faa

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