Malicious PDF — malware analysis report

Static analysis result for SHA-256 30298894e7c98ce7…

MALICIOUS

PDF

45.0 KB Created: 2021-06-08 16:18:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0cbcc9aac6960301ed545ffe64cb560e SHA-1: 6726087d8138eb70a3e9ec72f9bf2e89ecce068e SHA-256: 30298894e7c98ce733cc61cf2b30d9c69724c354972244af09b49486d1dc1a57
142 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links, likely for downloading further malware or redirecting to phishing sites. The document contains a large number of external links, many of which are SEO-optimized and point to sites offering game-related cheats or hacks, suggesting a scam or malware distribution campaign. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-get-free-robux-2021-december-game-hack
    • http://easytransferbrazil.com/images/roblox-hack-mod-menu-android_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdf
    • http://easytransferbrazil.com/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/apps-to-get-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/today-free-spin-coin-master_GM406889139.pdf
    • http://easytransferbrazil.com/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdf
    • http://easytransferbrazil.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://easytransferbrazil.com/images/roblox-robux-hack-generator_GM431946152.pdf
    • http://easytransferbrazil.com/images/how-to-log-out-of-coin-master_GM406889139.pdf
    • http://easytransferbrazil.com/images/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/free-minecraft-skins-ps4_GM479516143.pdf
    • http://easytransferbrazil.com/images/bloxpage-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/roblox-hack-com_GM431946152.pdf
    • http://easytransferbrazil.com/images/robux-free-online_GM431946152.pdf
    • http://easytransferbrazil.com/images/coin-master-online_GM406889139.pdf
    • http://easytransferbrazil.com/images/coin-master-links-2021_GM406889139.pdf
    • http://easytransferbrazil.com/images/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://easytransferbrazil.com/images/minecraft-games-free-to-play-online_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507a.bin
8cea44a13dbf42acb367aa2f88bdb604a077549286b7c218b95ce61d25844d7c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507A 25520 bytes
font_01_sfnt_off00008acc.bin
b69a27d46aecd28972d14d899e9575e5e5d1ff01a42eeb7dfaf960ff29957722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACC 19112 bytes

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