PDF malware analysis — malicious · 547c6c04d86bdabf

MALICIOUS

PDF

35.0 KB Created: 2021-06-23 01:14:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 5897dc7da511c874238d5f221469b59c SHA-1: 99a1993cc805691ff761117e12c484b6772ea93e SHA-256: 547c6c04d86bdabf368ab267dfec874b93bd37c98322ae6aaa705d800a8eea3d

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm designed to attract users with themes like 'free robux' and game hacks. The primary URL http://netcdn.co/app/431946152/free-roblox-rip-offs-game-hack suggests a potential download or redirection to malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of harmful intent.

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.co/app/431946152/free-roblox-rip-offs-game-hack PDF link annotation
- https://www.yantan.com.tw/upload/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/get-free-robux-now-2021_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-hacks-for-roblox-fallen_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-dolphin-hacks_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-free-robux-works-2021_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-change-your-chat-colour-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/cheat-engine-hack-roblox-rpg_GM431946152.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
`font_00_sfnt_off000031bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31BF	22652 bytes
SHA-256: `ebaebc83d7a9a3da1e7086b8d4a4cd1cd7c289d053dac9c37eb7173276d63b4c`
`font_01_sfnt_off00006435.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6435	18948 bytes
SHA-256: `c3a43e4a7346f4831786a052cda06ca8e74082c8fb7f9766451b454c75f77b6b`

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