Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a5e2fa8bacd7a5…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 19:09:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b5be23b1eb3c8db12ac1e47f975536f0 SHA-1: 7b5a2f0c686657cd4fd34a0e3fa3bc6560f1d023 SHA-256: 61a5e2fa8bacd7a5e85ccd44274f684b50ef25f65c1ff6337a58257ed92e2b98
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs and a high-confidence heuristic indicating it's a game hack lure. The document body, though partially corrupted, contains references to 'Coin Master Hack Injection' and directs users to a URL that promises game hacks. The presence of numerous related PDF filenames in the URLs suggests a campaign distributing lures for popular games to trick users into visiting malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-injection-game-hack PDF link annotation
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-rules_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-free-pets_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_003_off00004bb2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB2 24440 bytes
SHA-256: 7bade92e508ef5c22372bbe25c8ff456b2c4667b1ff9ac8f99c7349fc8f22f22
font_01_sfnt_off000083da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DA 17904 bytes
SHA-256: e2ecece8bed95e57b3476d6fcf28d44a2eaa01b2bbba7ca5de9533271a3d1e36

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