PDF malware analysis — malicious · bf9adfad493d29ae

MALICIOUS

PDF

50.5 KB Created: 2021-06-03 09:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d0b787b61585bc1f87a4a688a723114b SHA-1: 305ed5fd82319acfc2d23b8afa32d81a7696ba69 SHA-256: bf9adfad493d29ae37903c3cb712b8c74ab5a8842d90d514a0a7c14149ee9670

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to lure the user into downloading a game hack, directing them to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a phishing or scam attempt. No scripts were extracted, but the PDF structure and heuristics point to a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9779

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/roblox-download-game-hack
- https://yowchang.com/image/data/files/master-coin-hack-mod_GM406889139.pdf
- https://yowchang.com/image/data/files/coin-master-hack-apk-2021-ios_GM406889139.pdf
- https://yowchang.com/image/data/files/free-spins-and-coins-coin-master-app_GM406889139.pdf
- https://yowchang.com/image/data/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
- https://yowchang.com/image/data/files/free-roblox-dominus_GM431946152.pdf
- https://yowchang.com/image/data/files/get-tiktok-followers-free_GM835599320.pdf
- https://yowchang.com/image/data/files/all-minecraft-handbooks_GM479516143.pdf
- https://yowchang.com/image/data/files/114-4-hacks_GM479516143.pdf
- https://yowchang.com/image/data/files/coin-free-spin_GM406889139.pdf
- https://yowchang.com/image/data/files/how-to-get-free-robux-without-offers_GM431946152.pdf
- https://yowchang.com/image/data/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
- https://yowchang.com/image/data/files/coin-master-hack-apk-2021-download_GM406889139.pdf
- https://yowchang.com/image/data/files/haktuts-coin-master-free-spins_GM406889139.pdf
- https://yowchang.com/image/data/files/free-roblox-avatar-ideas_GM431946152.pdf
- https://yowchang.com/image/data/files/coin-master-fan-club_GM406889139.pdf
- https://yowchang.com/image/data/files/coin-master-rewards-2021_GM406889139.pdf
- https://yowchang.com/image/data/files/how-to-get-roebucks-on-roblox_GM431946152.pdf
- https://yowchang.com/image/data/files/apps-that-give-you-free-robux_GM431946152.pdf
- https://yowchang.com/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdf
- https://yowchang.com/image/data/files/coin-master-hack-for-android_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00004dd4.bin` `9cf95aefa727b9b0c77661e0d1a8e475416cfca6ad383a569575d64e605e0cea`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DD4	32568 bytes
`font_01_sfnt_off00009543.bin` `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9543	3884 bytes
`font_02_sfnt_off0000a1eb.bin` `21b28ace4d932993d49d3193db8b098f0f06cc97e3b5056ef7549ebd787d2b01`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA1EB	18520 bytes

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