PDF malware analysis — malicious · 9b10426cb42652de

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 18:13:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 200e86fb84231d72fd13733fba860025 SHA-1: 93e1f140e0de7ae9d36cbb26fc23a1f4e3d5ca61 SHA-256: 9b10426cb42652dee80acc6a0bad29515af61dc278e4bb0c27b83a7620317da3

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds external URIs pointing to what appear to be scam or malware download sites. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-servery-game-hack PDF link annotation
- http://www.fluidtech.hu/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/hack-download_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/easy-robux-generator_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/free-roblox-injector_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/get-robux-com_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
- http://www.fluidtech.hu/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/code-free-robux_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.fluidtech.hu/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
- http://www.fluidtech.hu/images/free-coins-coin-master-blog_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
`stream_004_off00004f18.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F18	28072 bytes
SHA-256: `5e735e738042afd038b3570c474366cb0f704931d06d97179af689d011a6e10a`
`font_01_sfnt_off00008f7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F7B	18308 bytes
SHA-256: `74a940f1217583ab80956cd168fb81f959241543e2b3413e790743682303989f`

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