PDF malware analysis — malicious · 41068bd2f11f41ab

MALICIOUS

PDF

48.6 KB Created: 2021-06-11 05:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 4f37ae3558a5f47956eda28a20c7796f SHA-1: 3f4f68551f7a71e1775dcff2031be52d52032d45 SHA-256: 41068bd2f11f41ab80b4094ded365c27740512d877ae95739f69a6c850a07943

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to websites offering game hacks and cheats, indicating a lure for users. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-online-play-roblox-game-hack
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-things-on-roblox_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/free-minecraft-survival-server_GM479516143.pdf
- https://www.unicor.co.th/assets/editoruploads/files/how-do-u-hack-roblox_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-apk-download-2021_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-without-verification_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/free-gold-cards-in-coin-master_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-2021_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-master_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/robux-generator-no-survey_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/pubg-uc-number_GM1330123889.pdf
- https://www.unicor.co.th/assets/editoruploads/files/free-unlimited-coin-master-online-tool_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/get-free-food-in-coin-master_GM406889139.pdf
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
- https://www.unicor.co.th/assets/editoruploads/files/roblox-account-taker_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/cool-free-roblox-outfits_GM431946152.pdf
- https://www.unicor.co.th/assets/editoruploads/files/real-free-spins-for-coin-master_GM406889139.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_off000052bc.bin` `1d19044a16c8978b1233a2ec7483ef76258136a3cd832e69aa67454eeb6499e2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52BC	26528 bytes
`font_01_sfnt_off0000903c.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x903C	2880 bytes
`font_02_sfnt_off00009a26.bin` `1e28bad6aeae33edf727dbee22863a4b07c4926f12bb5ece4194d1f2a610fa4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A26	18628 bytes

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