Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c9dfa7b61a8124…

MALICIOUS

PDF

46.8 KB Created: 2021-05-16 04:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2deca2006e28544403bd29d88df5fdab SHA-1: 659833a7e732ffb247196e86369a37cd5608abf3 SHA-256: 32c9dfa7b61a812444a979caab889901999f382c9d79e424a242dfcfed633d17
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a 'game hack' redirect lure, pointing to a URL associated with human verification scams. The document body and embedded links reinforce this lure by mentioning 'Free Robux' and 'game hack'. While no scripts were explicitly extracted, the nature of the lure suggests it is designed to lead the user to a malicious site that may attempt to download further malware or conduct phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/431946152/free-robux-human-verification-game-hack PDF link annotation
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-robux-no-apps_GM431946152.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
stream_003_off000053b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B1 27964 bytes
SHA-256: e904043a7b66a96e98cd2703c9cdab379fb0587ab57c127fe95cac0835e7bc75
font_01_sfnt_off0000930e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930E 18860 bytes
SHA-256: 3ed55990981222bb3dfa17f7dde8eecdc80202874b70715493d2aac032643dcf

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