Malicious PDF — malware analysis report

Static analysis result for SHA-256 927eb66204c066d5…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 11:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b4c10655c38e57568d0d31dfbc967f46 SHA-1: eb009230999b59638c256238b52568e8a9da5bac SHA-256: 927eb66204c066d5ca63d8b4fb1cc826c15bb9dcd85530ef52433c5953b97493
142 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to execute commands, a common tactic for malware delivery. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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.
  • 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
  • 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.tw/app/431946152/oprewards-free-robux-game-hack
    • https://i-tech.ac.id/perpus/repository/free-roblox-accounts-2021-october_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-2021k-robux-no-password-obby_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/haw-to-get-free-stuff-roblox-march-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/huskybuscom-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/synapse-roblox-exploit-free-download_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-have-a-jetpack-on-my-character-free-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-invitation-template_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-dark-egg-on-raise-a-dragon-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/minecraft-free-apk_GM479516143.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-how-to-get-non-free-models_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/youtube-how-to-get-free-robux-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-robux-cheat-way_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-no-generator-no-verification_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/daily-free-spins-coin-master_GM406889139.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-without-password-or-hacking_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-hair-boy_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/get-tiktok-followers-free_GM835599320.pdf
    • https://i-tech.ac.id/perpus/repository/best-lvl-7-roblox-hack_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-works-no-surveys-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003027.bin
ae8919d708ccca14fe389d745c9df4238a0814c8a55ac5e1ad8ae475808dce8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3027 22244 bytes
font_01_sfnt_off000061a1.bin
28d2551d9716c0c1f642d1de59876c155fe982ad5f1d32fc26186d5dbb125a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 19228 bytes

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