PDF malware analysis — malicious · ea2067c02717fbf0

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 10:52:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 78ab346be99f33127e6c742e76668f7a SHA-1: 6b8421b9b26b915298667d3602f59d2a15f0b5f6 SHA-256: ea2067c02717fbf086bf41156d814537d992f18fdbb76893bbcae75ebbcc0507

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, designed to trick users into interacting with the document. It also embeds external URIs, including one pointing to 'netcdn.online', which likely serves as a download location for a secondary payload. The presence of these elements, combined with the ML classifier's high confidence, indicates a malicious intent to deliver further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-on-coin-master-2021-game-hack
- http://perpustakaan.ipts.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/robux-game_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdf
- http://perpustakaan.ipts.ac.id/repository/roblox-toy-codes-free_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/coin-master-100-spin_GM406889139.pdf
- http://perpustakaan.ipts.ac.id/repository/give-me-free-robux_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/www-rubux_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/hack-roblox-players_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdf
- http://perpustakaan.ipts.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdf
- http://perpustakaan.ipts.ac.id/repository/free-roblox-glasses_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdf
- http://perpustakaan.ipts.ac.id/repository/robux-generator-that-works_GM431946152.pdf
- http://perpustakaan.ipts.ac.id/repository/minecraft-hack-2021_GM479516143.pdf
- http://perpustakaan.ipts.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdf
- http://perpustakaan.ipts.ac.id/repository/free-minecraft-servers-to-join_GM479516143.pdf
- http://perpustakaan.ipts.ac.id/repository/coin-master-fan-club_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_off0000507c.bin` `74c88e2d672b1d4649f52b68749e85fc690fe327ae4d984e204ebecba2432e07`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x507C	24956 bytes
`font_01_sfnt_off00008893.bin` `e7fc04cebd192de8ea685c8f65a9790caba4d729d1f53b0455241ee170bde56f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8893	18288 bytes

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