Malicious PDF — malware analysis report

Static analysis result for SHA-256 659f8e606df4e26f…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 08:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 775d7716d0094bb791cc735f5f14a9ef SHA-1: 89f5ef158eacdf7a6157a19dbe08d998d81586b5 SHA-256: 659f8e606df4e26f0f136670362dc6912a28acb7f5424aaef73c35e71146763d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a game hack lure to entice users to click on an external URL. This URL, 'https://netcdn.online/app/479516143/minecraft-anarchy-server-no-hacks-game-hack', is likely a redirector to a malicious payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/minecraft-anarchy-server-no-hacks-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pokemon-go-free-vs-premium_GM1094591345.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-kid-friendly-no-human-verification_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
stream_004_off000053ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53AD 25868 bytes
SHA-256: b291d5f0c8c6033652f595172a06d20bcaea26fee32b06165ab79927474c5b50
font_01_sfnt_off00008e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 18340 bytes
SHA-256: 25c1286fde013f5a892faec283bed83878941bbea70c27f39483b80af7cfb438

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