PDF malware analysis — malicious · 5f15aa881253377f

MALICIOUS

PDF

47.5 KB Created: 2021-05-20 02:45:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c386d97fc2615c9d145fe0217ba5c280 SHA-1: 9bee08872baf916f177d700b5bdfe6cb30b81de6 SHA-256: 5f15aa881253377fcca0084f07272a4d74bf1f78c4e2f18a8009054634832e69

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into interacting with the document, likely to download a secondary payload. The embedded URI and numerous other URLs point to domains hosting potentially malicious files, suggesting a downloader or exploit delivery mechanism. The document body, though heavily corrupted, contains references to 'free Robux' and URLs related to game hacks, reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/can-you-get-free-robux-on-roblox-game-hack PDF link annotation
- https://vieclamjapan.com/upload/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/wurst-18-9_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-accounts_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000047f9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x47F9	28628 bytes
SHA-256: `985801c210274b92e3c230693280756334029c93de0f2bfc6bd332bf362a777b`
`font_01_sfnt_off000087ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87EC	6100 bytes
SHA-256: `f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c`
`font_02_sfnt_off00009678.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9678	18580 bytes
SHA-256: `0d0c29456045ba8700eeeb9b5d08ef238a74b3c73615dbb1a220be23830403a6`

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