PDF malware analysis — malicious · 79e637925d162249

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 07:31:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3d6d685a911dd97b83063f5b6a5cd021 SHA-1: 5742fbacd44a9c87d6367552e131da2079c4924f SHA-256: 79e637925d162249c2e958e641ed5df4e663f9fb9c8cc31f1f516b3b7bc5b27f

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 an external URI pointing to a suspicious URL, which is likely intended to download and execute a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/ww-robux-game-hack
- https://www.gulfautotools.com/uploaded_files/userfiles/files/claim-gg-free-robux_GM431946152.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-game-hacks_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-hack-spins-free_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/pubg-uc-whatsapp-group-link_GM1330123889.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-premium-free_GM431946152.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/free-tiktok-followers-generator-no-human-verification_GM835599320.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-hack-me_GM431946152.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-com-hack_GM431946152.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/100-free-spins-for-coin-master-2021_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/2021-free-spins-coin-master_GM406889139.pdf
- https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.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_off00005026.bin` `82370fdce0cbdeb66f3e49445f66c1d4263f55a51d0cdbeb5a66ac49b2a27b4e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5026	24540 bytes
`font_01_sfnt_off000088bc.bin` `bcccb1e001e2f5e7ef72a5433eb4dc11bdbc574927e5f5e748e53d7576d93cee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88BC	18212 bytes

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