PDF malware analysis — malicious · 9713a8faa57bdb6b

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 04:35:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: d3e37ebe84e1d5daafaa442de62124c2 SHA-1: ab4d4281b39312b764b6cef5c1ab68a18951a883 SHA-256: 9713a8faa57bdb6b27cfd1cbfdf816b9e02735261e41071d36b3dbfd56060f01

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/free-attacks-on-coin-master-game-hack, is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'Coin Master' and 'free attacks', reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/free-attacks-on-coin-master-game-hack PDF link annotation
- https://alimi.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/bux-free-robux_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
- https://alimi.com.tw/upload/files/how-to-hack-someones-roblox-account-2021_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_003_off00004b03.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B03	24828 bytes
SHA-256: `8a314864db6d0c68a21b87cef255b83141783635b1be8ddc3b0bfa76c4c98b8e`
`font_01_sfnt_off00008454.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8454	17880 bytes
SHA-256: `29d75bb9bbadf62398e74281051d2631fb9c7658556dc1dc6690862643678cc9`

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