PDF malware analysis — malicious · fd5f735215b2c952

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 01:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: bc2f9d51eaef55cd9b2f0c75f30b36c0 SHA-1: d5efd89b0f5ee153a8fd4ba919be0e60915869e9 SHA-256: fd5f735215b2c95223b463d97eeb699ab5d670361314afffed83143c9f9cac25

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document exhibits characteristics of a malicious PDF, including a fake CAPTCHA lure and embedded external URLs. The primary URL, https://netcdn.tw/app/431946152/bloxburg-com-free-robux-game-hack, suggests a lure related to game hacks or cheats. The presence of a fake CAPTCHA indicates an attempt to trick the user into interacting with a malicious link, likely to download a secondary payload.

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/bloxburg-com-free-robux-game-hack
- http://repository.unla.ac.id/repository/rbx-sites_GM431946152.pdf
- http://repository.unla.ac.id/repository/pokemon-go-free-spoofing_GM1094591345.pdf
- http://repository.unla.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
- http://repository.unla.ac.id/repository/download-coin-master-hack_GM406889139.pdf
- http://repository.unla.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdf
- http://repository.unla.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdf
- http://repository.unla.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdf
- http://repository.unla.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
- http://repository.unla.ac.id/repository/hack-free-spin-coin-master_GM406889139.pdf
- http://repository.unla.ac.id/repository/mcpe-master-free-coins_GM406889139.pdf
- http://repository.unla.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdf
- http://repository.unla.ac.id/repository/free-robux-com-2021_GM431946152.pdf
- http://repository.unla.ac.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdf
- http://repository.unla.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
- http://repository.unla.ac.id/repository/corn-master_GM406889139.pdf
- http://repository.unla.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdf
- http://repository.unla.ac.id/repository/actual-free-robux_GM431946152.pdf
- http://repository.unla.ac.id/repository/free-robux-codes_GM431946152.pdf
- http://repository.unla.ac.id/repository/coin-master-tool-hack_GM406889139.pdf
- http://repository.unla.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00004dd6.bin` `964c20edd2fe1ee701874f6c159fa40539b3ea4e70330d40ce08fdb4bb918dfa`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DD6	29060 bytes
`font_01_sfnt_off00008eb0.bin` `3fb906bc4a5285c884cf0532a0bc4d1fe0283943ee8fa4cb746fa8fac7117b49`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EB0	18636 bytes

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