PDF malware analysis — malicious · 36244b3677081356

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 8496fd62c3d24498540c27aa53ead013 SHA-1: 1f8b7a8897cf634d84c64090b00133722c5d7485 SHA-256: 36244b3677081356a8ebd6cb750043fbb758f11d9a5bb26110e34adefc6510e6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/free-robux-generator-no-human-verification-2021-game-hack PDF link annotation
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/how-to-get-tiktok-followers-for-free_GM835599320.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.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_off000051fc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51FC	25860 bytes
SHA-256: `4a2f418835f9fb44fb4550a6ddd8e1e9bac047b319453208d4849b8ebf7be596`
`font_01_sfnt_off00008bf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BF0	19260 bytes
SHA-256: `cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4`

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