PDF malware analysis — malicious · b4aaa858550ca7ba

MALICIOUS

PDF

46.1 KB Created: 2021-05-11 02:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 1c7ebcb77b0ba811e31fd062e73fe18a SHA-1: 3bc40d1d61024ea21b0868f5f8c086a55d3ee666 SHA-256: b4aaa858550ca7ba499125f3fc5dc81ab8b1059e2a923b1152a8aec5bb30b71c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spamming attempt. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, possibly as a lure for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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.xyz/app/431946152/robuxy-com-generator-game-hack
- http://enosiderma.gr/images/coin-master-free-spin-ml_GM406889139.pdf
- http://enosiderma.gr/images/master-coin-master-free-spin_GM406889139.pdf
- http://enosiderma.gr/images/but-link-says-free-robux_GM431946152.pdf
- http://enosiderma.gr/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdf
- http://enosiderma.gr/images/free-coin-link-for-coin-master_GM406889139.pdf
- http://enosiderma.gr/images/coin-master-free-spins_GM406889139.pdf
- http://enosiderma.gr/images/coin-master-hack-cheat-engine_GM406889139.pdf
- http://enosiderma.gr/images/today-free-spin-coin-master_GM406889139.pdf
- http://enosiderma.gr/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
- http://enosiderma.gr/images/coin-master-pet-food-hack_GM406889139.pdf
- http://enosiderma.gr/images/how-to-get-coin-master-card-free_GM406889139.pdf
- http://enosiderma.gr/images/coin-master-spin-hack-pc_GM406889139.pdf
- http://enosiderma.gr/images/minecraft-windows-10-free-trial_GM479516143.pdf
- http://enosiderma.gr/images/install-free-game-coin-master_GM406889139.pdf
- http://enosiderma.gr/images/coin-master-promo-code-2021_GM406889139.pdf
- http://enosiderma.gr/images/how-you-get-robux_GM431946152.pdf
- http://enosiderma.gr/images/hackear-coin-master-sin-verificacion_GM406889139.pdf
- http://enosiderma.gr/images/real-robux-generator_GM431946152.pdf
- http://enosiderma.gr/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
- http://enosiderma.gr/images/minecraft-hack-app_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_003_off000048c6.bin` `5a6e2a359b4c6784bd70c47a5309f08e75fd09ade07668bff85824b79866f673`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48C6	26012 bytes
`font_01_sfnt_off000083fb.bin` `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83FB	3884 bytes
`font_02_sfnt_off000090a3.bin` `564b676c83dfcfb2d17032d30a69b1d7bc1cf309ea05e1634c9d6195baca18fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90A3	18624 bytes

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