PDF malware analysis — malicious · 1e53c8b811d301d4

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 16:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: c214e25745539db5010b51807f967345 SHA-1: 6c3e22d1b5430739e1aaa14c0df59c2d10ce510d SHA-256: 1e53c8b811d301d49d3263ca66161925c26890c10c54f7e6a320239ccb5395f2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as a link farm for SEO purposes, pointing to pages offering game cheats and free in-game currency. One embedded URI, http://netcdn.tw/app/479516143/minecraft-free-apk-game-hack, suggests a direct attempt to lead the user to download a potentially malicious application. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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/479516143/minecraft-free-apk-game-hack
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/cheat-phantom-forces-roblox-2021_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-net-au-net_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-coins-coin-master-iphone_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/grabpoints-robux_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-robux-fast_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-free-angel-wings_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-use-roblox-on-pc-for-free_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-hack-an-old-roblox-account_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-hack-link-2021_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/google-coin-master-free-spins_GM406889139.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux-2021_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/hackear-cuentas-de-roblox-gratuitas_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdf
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/hacks-on-roblox-grand-theft-auto_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000033a2.bin` `e913a4335500f9720e261d428c5e820fdf0a3da43965dd74da4ef1521fa3d9ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33A2	22800 bytes
`font_01_sfnt_off00006624.bin` `df1e656c8f83adbffe018ceec80089e30cbc9ee1f65ea69fcf3a46ef834d3d44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6624	18204 bytes

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