PDF malware analysis — malicious · 4a39fa524a601cb6

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 07:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: fdd42c299a0bcecf426d4d294f5d51ce SHA-1: c20d49ef8b8ab8d16fb6748a2d5e4c73ebd78e66 SHA-256: 4a39fa524a601cb63adca59344bd0f7d7db110b5210e8be6d90b7714a111aa42

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free items, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/coin-master-collect-today-free-spin-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-items_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-minecraft_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/pubg-uc-18_GM1330123889.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coinmaster-com_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000561a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x561A	25160 bytes
SHA-256: `7dd02680c2bd4ef0dd78bcc8ddec107e6588e5144feb273b0ad53281fa042113`
`font_01_sfnt_off00008e77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E77	18316 bytes
SHA-256: `067ee842a42bfe5a53e1cb92f98c8b2340557740837e286662f405d2db83d214`

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