PDF malware analysis — malicious · 9f6bb6ba405f7cd1

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 11:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 16ff97052e0ab438cf8bf8d1611e53bf SHA-1: c33f2d67d8df1742903bccb661166a1a7a7ec79c SHA-256: 9f6bb6ba405f7cd1b0319c7135aa33867f4e8b1576d72fc192e9f9fab22e6ed0

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on a domain associated with link farms and SEO spam. The document body and extracted URLs suggest a lure for in-game items or currency, likely a scam or phishing attempt. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-game-hunters-club-game-hack PDF link annotation
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.vpn-solutions.com.pe/ckfinder/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000487c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x487C	24684 bytes
SHA-256: `cc31154e7101a6f6234c21aa71fcb23dc5ca8c0956d01de4a91de3c6cc069e10`
`font_01_sfnt_off00008163.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8163	18176 bytes
SHA-256: `74ffa4d131b86204091f15510d9e99a1a5fd5d4654b2a7ca9c54d403d144afe2`

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