PDF malware analysis — malicious · 4a08e9d3032c0e67

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 16:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 25bf2605b23a2b1aab4bf55b859fe492 SHA-1: 1992a5d325f3d20e444b8637638627fe5754ba2c SHA-256: 4a08e9d3032c0e6799cebf9e2fca394abecd39e00fb8e2a4d3ed4fd7b41c0700

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, indicating an attempt to trick the user into interacting with the document. It also embeds external URIs, including one pointing to a suspicious URL, suggesting it aims to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-promo-codes-free-robux-game-hack PDF link annotation
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/offers-for-robux_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/moonactive-coin-master_GM406889139.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_off000049e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x49E9	24356 bytes
SHA-256: `c72fc301179e01122c46dc5fd74bf08cfefc685487762c69b4b7dd98f85cbc5d`
`font_01_sfnt_off00008127.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8127	18676 bytes
SHA-256: `3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f`

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