PDF malware analysis — malicious · a3102e0187b910b7

MALICIOUS

PDF

33.0 KB Created: 2021-07-07 16:53:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: d627bb9d28c21b1262eaff8119699fb3 SHA-1: cffd44e836071be5b2a335e1ed73f73d117c9253 SHA-256: a3102e0187b910b765e40140fc980a7e0650b35ab6fd1487a1ff642de881ee95

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many of which are part of a link farm designed to attract users searching for game cheats and freebies. The primary URL http://netcdn.tw/app/479516143/minecraft-bedrock-hacks-game-hack likely serves as a landing page for a malicious download or exploit. The ML classifier strongly indicates malicious intent, and the presence of a download button lure reinforces this assessment.

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/479516143/minecraft-bedrock-hacks-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-hack-forum-by-vix_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/tshirt-adidas-for-free-roblox-of-2021_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-survasy-or-taksks_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-verification-on-laptop_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/kid-cheats-on-roblox-girlfriend_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-generator-no-human-verification-or-surveys_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_off00002eaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EAA	21460 bytes
SHA-256: `e670e3d7b5ca8b7193f10e80b2bf3a3a56b279886ae7bfeb0caa82c532cc63d5`
`font_01_sfnt_off00005d6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D6E	18560 bytes
SHA-256: `bf91848bbe4a5734be67a8baa70ac7478c65c6d6f338040dd833668453e1921b`

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