PDF malware analysis — malicious · 5e4264297db5e8e1

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 00:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 0e1ce56c3d2eaa1d139ffba4c3a7ef72 SHA-1: f4d46dc960b91e419d842f4d4acf45b308c4a037 SHA-256: 5e4264297db5e8e1886fa16b4875ce86972a063c4aa9333ceca90cc3c777f9c3

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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 http://netcdn.tw/app/431946152/how-to-get-roebucks-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/your-cheating-on-your-roblox-girlfriend-meme_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/synapse-hack-roblox-download-free-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-for-mac-os-x-free-download_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-speed-hack-in-swordburst-2-in-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-codes-download-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/robux-redeem-codes-free_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack-commands-list_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-steves-one-piece-hack-tp-chest_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-mobile-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_off00002f16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F16	22320 bytes
SHA-256: `145c2236426fa8a0d9c88ef9d9581f6763c58738d766aed5242fed6ab178f167`
`font_01_sfnt_off000060d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60D1	18780 bytes
SHA-256: `cbc4d9ca89efa05c36d0990942cb8c95bcf8b482279d0344eae9b58d23f39d2a`

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