PDF malware analysis — malicious · b567d1613b397342

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 08:38:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 921411f8cdd1e9c93b823e4042080adc SHA-1: e99f3980c964f65530e4c56f08a704050322f297 SHA-256: b567d1613b3973429c237c8155e60a5bb5bebb879faa3cad3a6d6a5563f10061

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 0.9632

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.xyz/app/406889139/coin-master-free-spins-2021-game-hack PDF link annotation
- https://www.deg91.com/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
- https://www.deg91.com/upload/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/easy-roblox-today_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
- https://www.deg91.com/upload/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/coin-master-level-3_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.deg91.com/upload/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
- https://www.deg91.com/upload/files/info-roblox-com-robux_GM431946152.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_off0000493a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x493A	25780 bytes
SHA-256: `c7f9dc2dc57c1c278569f6c63b9c3eed82903ce4a979ce6a00012995a1aa9a34`
`font_01_sfnt_off00008325.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8325	2920 bytes
SHA-256: `601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7`
`font_02_sfnt_off00008d3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D3E	18288 bytes
SHA-256: `9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871`

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