Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2520c1b267102e9…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 04:12:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 837e0fd5e493cf8fad95897a64933629 SHA-1: f61e4379313e79bd6fdd0e0e1b945f60400800b2 SHA-256: c2520c1b267102e994b4ac62aff8c6f3408d38204132d176835ff336210fbc92
82 Risk Score

Malware Insights

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

The PDF document contains multiple links that are identified as lures for game hacks and generators. The primary link, http://netcdn.tw/app/479516143/plug-toolbox-for-minecraft-free-ios-game-hack, strongly suggests a malicious intent to redirect users to potentially harmful content. 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/479516143/plug-toolbox-for-minecraft-free-ios-game-hack PDF link annotation
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/como-ser-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-make-a-free-robux-scam-game_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/20210-pubg-uc-in-indian-rupees_GM1330123889.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-become-a-roblox-hacker-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-robux-without-human-verification-and-password_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/hack-generator-robux-sans-verification-humaine_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/robux-free-me_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-free-202100-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-verification_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-robux-glitch-site_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-fr-extreme-hack-net_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3451 22628 bytes
SHA-256: 61b6b94ec06595f685500b3512eaa602b4869e0cbaa85893ebe7cdef3731b5b0
font_01_sfnt_off000066ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 18736 bytes
SHA-256: 9cf7fe8b5647e01d4eb492bc675b0c64d11ed2e32af9da0d2909089a9be9f8b8

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