Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c791f725ad2fae7…

MALICIOUS

PDF

43.3 KB Created: 2021-05-18 05:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8bbe344133ec7d8da7b617758bfef9ef SHA-1: a71a1e9f9dce2af876f5ebaa060b1569b960eeeb SHA-256: 1c791f725ad2fae7d2a331cd7f2a0feb92470fe7173bd2f0da193bd43ecc90eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to external URLs. The ML classifier strongly indicates maliciousness, and the presence of numerous links to potentially malicious sites reinforces this. The document's primary function appears to be redirecting users to exploit kits or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/best-tricks-co-robux-game-hack PDF link annotation
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://joaquimdourado.adv.br/uploads/ckfinder/files/spin-coin-master-hack_GM406889139.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_off00004bf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF3 25760 bytes
SHA-256: 1b2ae647a203c52594b0306220b630ed2a248679df5e8a1995be6379fbc8906c
font_01_sfnt_off0000872c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872C 18244 bytes
SHA-256: 6afc49dcdc06995850e4f79f174129e4c8f3989aab61000e7222bd3966fc18fb

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