PDF malware analysis — malicious · 120517a85ab86164

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 05:07:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: c2b904766ff01378049ec95d7e3da2f2 SHA-1: 66c5232643913011cde6ecc74f468c3eec5ba688 SHA-256: 120517a85ab8616404d2f4a7aec8b9481582157206e4b6101a68cbedd7ebcadd

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are designed as SEO link farms for game cheats and free currency, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://netcdn.online/app/406889139/coin-master-free-coins-and-spins-online-tool-game-hack, suggests a lure for in-game rewards. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/406889139/coin-master-free-coins-and-spins-online-tool-game-hack
- https://www.nara.org.uk/uploads/files/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
- https://www.nara.org.uk/uploads/files/files/best-free-robux-sites_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/hacks-for-coin-master-game_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/coin-master-free-coins-today_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/get-free-spins-coin-master_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/free-robux-ad_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/my-roblox-avatar_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/mcpe-master-hack-coin-apk_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/free-cheat-codes-for-coin-master_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/get-free-robux-without-human-verification_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/hacks-for-minecraft-windows-10_GM479516143.pdf
- https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/free-roblox-codes_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-app_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/synapse-roblox-free_GM431946152.pdf
- https://www.nara.org.uk/uploads/files/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
- https://www.nara.org.uk/uploads/files/files/wurst-minecraft_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005096.bin` `1e82547b769c2d71e73b4e7883d8272ec911335c3162798b3f9ee44971f26748`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5096	24592 bytes
`font_01_sfnt_off00008929.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8929	2880 bytes
`font_02_sfnt_off00009314.bin` `5770a65a4ed8a40abc6da47fa935f6885b77eddd7dd52b1dc7a39247a3b65962`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9314	18132 bytes

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