Malicious PDF — malware analysis report

Static analysis result for SHA-256 c739a51910c0d581…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 02:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9848e160f0f9c640a3c408fbf7531921 SHA-1: dc71915826df051cd31691afdd753993dafcbeb9 SHA-256: c739a51910c0d581abae1bc73629a0769d06a8af36bae2c305a86870e07c0695
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body and embedded URLs reinforce this lure, directing users to a URL associated with game hacks and free views. The ML classifier also flagged this PDF as malicious with high confidence.

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/835599320/what-tiktok-free-views-without-verification-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/roblox-sand-simulator-hack-android-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/nbc-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-b-tools-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-lvl-7-script-executor-free_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-tool-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-codes-for-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hacks-scythe_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-virtual-items_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_002_off00002ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF0 25164 bytes
SHA-256: 8d0b2f529022292605b8e30eb04c1ad6630c37747784c23f3d84d8a48d0e28f0
font_01_sfnt_off00006917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 18776 bytes
SHA-256: f178b0c05354dad86128c4ae5d3912eaa08bd6136f80427919e99602ad55f526

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