PDF malware analysis — malicious · a9cf2dd14afcfb4d

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 10:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 649d66ee7498c1fdf30d009eeccd519b SHA-1: a9c41809cb7839b28fd6e8c9e99bbb73da3dac20 SHA-256: a9cf2dd14afcfb4da1af07d21e82da862fb24475d7359547a29933bb85b7368b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The document contains multiple URLs pointing to sites offering game hacks and free spins, suggesting a lure for users to download potentially unwanted or malicious applications. The presence of 'cmds-hack' and similar phrases in the document body further supports this malicious intent. Although no scripts were explicitly extracted, the ML classifier and heuristic firings strongly indicate malicious content within the PDF.

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/406889139/coin-master-daily-free-spins-link-app-download-game-hack
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-images_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-grand-blox-auto-2-all-cmds-hack_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-online-game_GM406889139.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-by-playing-games_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/robux-codes-unused-free-robux_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/my-hero-bizarre-roblox-free-point_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-d_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-december_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-explot_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-roblox-card-codes_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/blox-land-free-robux_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/hack-robar-cuentas-de-roblox-pastebin_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/cheat-roblox-speed-simulator_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/free-2021-robux_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/cheat-aimbot-roblox_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/cheat-roblox-uno_GM431946152.pdf
- https://www.vadai.sg/uploaded_files/userfiles/files/hack-para-tener-robux-2021_GM431946152.pdf
- https://www.vadai.sg/uploaded_file
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000311a.bin` `b531807fad49960d10640949ffaef3c1a9cad87df1d981d286018ed594b75a62`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x311A	22756 bytes
`font_01_sfnt_off00006424.bin` `8b72434a58502bdc53247ed689e807b70a7c32e8818b0cd2897b08e7e167a8b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6424	19104 bytes

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