PDF malware analysis — malicious · 1538ede7670dbdd2

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 10:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 910304a96590b290bf133f1bb2a64042 SHA-1: 2882240b1bc073f0a1d60232cb95b562008de172 SHA-256: 1538ede7670dbdd2a60ecc05cf0f11710fe96bbf84621c7899c4ea51e249828f

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free virtual currency and game hacks, indicating a lure for users to visit scam websites or download unwanted software. The heuristic 'PDF_SEO_LINK_FARM' and the ML classification further support the malicious nature of this document. No scripts were extracted from this sample.

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/rbx-points-free-robux-game-hack PDF link annotation
- https://www.ruchya.com.tw/upload/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/2021-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-free-admin-hack_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-hack-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-make-a-shirt-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-super-easy-and-fast_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-free-robux-hack_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_off00003025.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3025	22296 bytes
SHA-256: `2d43e6c54e8c3cf64439c62e6f5b4822516531074d6fd0a5508c1f63a9799da3`
`font_01_sfnt_off00006187.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6187	19092 bytes
SHA-256: `5429e3842df609483ab0e41882b0bfee7f02bd38fff807f5af59dbe21819a698`

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