Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b041bc91d43474…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 13:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e89edb7924518c5c1daeaa4511d4fc6 SHA-1: a71e214c19a732c22c88b13e025e3526be1dfc9a SHA-256: 34b041bc91d43474faa43b648475932bcb73e6243843a6f89e1b54efec1f1db1
142 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, presenting a fake CAPTCHA to deceive users into interacting with embedded links. The document contains a large number of external links, many of which point to resources related to game cheats and free virtual currency, suggesting a scam or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/bad-business-cheats-roblox-game-hack
    • http://pustaka.mesin.ft.unand.ac.id/repository/get-free-robux-no-survey-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/do-you-want-free-robux-get-unlimited-robux_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-make-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-much-tiktok-free-view-creator-fund_GM835599320.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/spin-and-coin-link_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/roblox-cheat-codes-for-robux-2021_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-ml_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/can-you-use-cheat-engine-to-hack-robux_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/mobile4free24-free-robux_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-mast-hacks_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-face-roblox-face-anime-girl-blushing_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/roblox-bloxburg-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fed.bin
8f571d88842be6b6d72b1a26bd85ebcc3edd1f0957ba6f44abb1a1077f1147ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FED 22080 bytes
font_01_sfnt_off000060f0.bin
cebd083882c8621ebadf846342542ec861d74e33d29775987ceeae227ba45d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 19192 bytes

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