PDF malware analysis — malicious · 99a649644c96ad0c

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 18:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: e4fe1c6f4b2e1115dac70b3d92d14d09 SHA-1: bb84e2340a699b9f70f320e17f556cb5caba1837 SHA-256: 99a649644c96ad0cd174423ddd1a106542c35b336fb30f3093468d6815664ecd

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are hosted on 'esmartdigitalcard.com' and promise free Robux or Coin Master spins, indicating a scam or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' further suggests a large number of such links. The ML classifier also flagged this PDF as malicious with high confidence. Although no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest it's designed to redirect users to potentially malicious content.

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/406889139/coin-master-email-free-spins-game-hack
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-unlimited-robux_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/minecraft-pe-hack-client-ios_GM479516143.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-hacks-on-lumber-tycoon-robux_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-facebook-free-spins_GM406889139.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-villages_GM406889139.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-cheatgg-safe_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-redeem-code-free_GM406889139.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-catalog-free_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-tiktok-without-verification_GM835599320.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/real-free-robux-generator_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-roblox-army-templats_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-hacks-2021-june_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/wil-they-cheat-roblox-thumbnail_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/medkit-free-robux_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-20210-robux-2021_GM431946152.pdf
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-do-u-get-robux_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_off00003301.bin` `77324f352f971d2f6bdb2f79632651e02ce0d4e15d7aa5d51035a19d960da58a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3301	22844 bytes
`font_01_sfnt_off00006602.bin` `857452a97ec4c8a0357fa4a60eb564765f702e021e296b9eb26375981d5eaeda`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6602	18508 bytes

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