Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43e9b1f250d3260…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 13:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2311aeffc6a74027b045ffc3126242a2 SHA-1: aaae5be5cb241b773afc58378d5d0ba3d8df6755 SHA-256: e43e9b1f250d32605be63830abd389dcd357899a48ddb0bd5e63d5aa3865a97b
82 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as free downloads for games and hacks, with one prominent URL pointing to 'netcdn.tw'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'cmd' token sequence in the document text suggests an attempt to exploit the user into downloading a second-stage payload. No scripts were extracted from this sample, but the overall structure and content indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/835599320/free-movie-websites-tiktok-game-hack
    • https://perpustakaan.iahntp.ac.id/repository/how-to-give-people-robux-for-free-in-roblox_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-avatar_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-robux-hack-download-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-hack-with-cmd_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-free-clothes-roblox-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-code-generator-free_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-durag_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/hack-roblox-origin_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/hack-roblox-money-2021_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/hacking-page-for-roblox_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/roblox-download-for-free-pc_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-any-face-on-roblox-for-free-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/hack-coin-master-for-android_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-free-roblox-items-using-coding_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-robux-hack_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-account-hacking-v3rmillion_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/reposi
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f3f.bin
ef314e079e51121d6404146e2c09143f332a2ac863a5bd436e5653f06fe6e4aa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3F 22040 bytes
font_01_sfnt_off00005fde.bin
5d063cb5a9bf5b367b0e1986cf07e35293c36f8ba32446db1f401839aee8b007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 18636 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.