PDF malware analysis — malicious · dc23eb3321560cfc

MALICIOUS

PDF

49.8 KB Created: 2021-06-03 16:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 23727aedd83d03633001067202c911d8 SHA-1: 39dc953ad98d9ae02c42354e26fa3007f8a603eb SHA-256: dc23eb3321560cfcd565a3d92b7367a52a526bcb937c9e5e812f1371d75a32e5

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for linking to a game hack, specifically targeting 'Coin Master'. The embedded URL, https://netcdn.online/app/406889139/the-coin-master-hack-game-hack, is the primary indicator of this lure. While no scripts were extracted, the PDF structure and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9751

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/the-coin-master-hack-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/robux-gratis_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-obby_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00004fc5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4FC5	24764 bytes
SHA-256: `227da5555a7327ec994272449dff70098352f911e30a277f41c75da41da1b39f`
`font_01_sfnt_off00008901.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8901	4092 bytes
SHA-256: `5f209d2de47fc1d1daa3f7a159899a6156681217a4da0d2c4432eb95998bf980`
`font_02_sfnt_off000096d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96D9	2788 bytes
SHA-256: `6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530`
`font_03_sfnt_off0000a0c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0C9	17880 bytes
SHA-256: `afc4fac2730f3a2f8a25d5e8140a94cee7725671c7e4afd2976262e654170630`

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