Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b60a5aff3f798c…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 10:45:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a39f8d1f9ce2cab6f8432da6acf32fc2 SHA-1: 7cc7a31595071da66af05e0ddd9cb5226ae98534 SHA-256: 09b60a5aff3f798c986dc3494ddc93eab0b691d004e4152b8b99797ba62feeab
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking malicious links. The document body and extracted URLs suggest a theme of game-related cheats or hacks, which is a common pretext for phishing or malware distribution. The presence of numerous external links, many with similar SEO-like slugs, indicates a link farm intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/cara-hack-pin-roblox-game-hack
    • http://library.itekes-bali.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/robuxy-com-generator_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-roblox-accounts-generator_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-earn_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-mojang-account-with-minecraft_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/free-coin-master-gift-link_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/without-human-verification-pubg-uc-hack_GM1330123889.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-hack-generator_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-you-get-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-hack-2021_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fc9.bin
a61e3dc596d6d3e1807641d430dc19c1b1332b64effc1b9ffe52b19518e53e8e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC9 28044 bytes
font_01_sfnt_off00008eaa.bin
74a5581b460a9625b18c4b56407ec0c7df81bd67b2f9c7937ed38061a6a89462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAA 18456 bytes

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