Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec6879db7ae2434…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 12:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5a3df601a41b9b4672712e6e8df5153d SHA-1: c365b04dbd54fae74a3362f74239755ddca37578 SHA-256: aec6879db7ae2434e8df491e60d46f2b040a62340a1ad29bf1f491156f2df2eb
122 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious and attempts social engineering by luring the user to execute commands. Specifically, it instructs the user to copy or paste content into a shell, consistent with ClickFix attacks. The embedded URLs likely lead to further malicious content or payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/www-roblox-com-robux-free-game-hack
    • https://ifef.es/ckfinder/userfiles/files/coin-master-map_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/do-robux-generators-work_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-free-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-account-hacked_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/giftrobux-com-generator_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-spin_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/master-free-spin_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-to-play-minecraft-servers_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f4.bin
f55956a68e79268ab84621b6aafbaac679579a4ea3a81d3491628d5db0057801
pdf-font-stream PDF embedded font (sfnt) at offset 0x51F4 27324 bytes
font_01_sfnt_off000090a1.bin
c91f27fd30ec200e2a0dbd5cc88ad35776bc2371b1b59549651737de5f7a4295
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A1 18708 bytes