PDF malware analysis — malicious · 111c82d53f8e5c71

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 00:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 2481cbd320cf09aa2854fc1b0cf7f8b7 SHA-1: d1fe46549207c7bb194a876ddeeb2b2a9f539c5b SHA-256: 111c82d53f8e5c71ea649f69e36b655ed7b1029d5aa8f925e5b12468cf667c53

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a fake CAPTCHA lure to deceive users into clicking a malicious link. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-daily-spin-free-game-hack, likely leads to a download of malware disguised as a game hack. The document's content and heuristics strongly suggest a social engineering attack aimed at tricking users into downloading potentially harmful software.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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-daily-spin-free-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/coin-master-support_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/play-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004a8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4A8A	24980 bytes
SHA-256: `9a17dc4f8904f9b58addccf811a5f30402eba720e1e79654e2da597c3aa3d737`
`font_01_sfnt_off00008300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8300	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00008cb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CB2	18308 bytes
SHA-256: `213ea0fed5678e19eff32fcc5d46e69a4f1b73f67043b57a178cf12547108d4a`

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