PDF malware analysis — malicious · 991331d7d7be3dd7

MALICIOUS

PDF

42.2 KB Created: 2021-05-18 02:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 358ccd19666be6de31d5c38c779ec05c SHA-1: 30b55457b7cdd8205789938591045f0a09d4dcac SHA-256: 991331d7d7be3dd75f036a0274fa1f16b0a6ac5511368c7e78072bd40b78710a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, including one identified as a 'free generator / game hack' lure. The document body also contains text related to obtaining free Robux and links to similar game-related PDF files. These elements suggest a social engineering tactic to direct users to potentially malicious websites. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/how-to-get-free-robux-codes-2021-game-hack PDF link annotation
- https://luyenthitoanpro.com/public/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/my-robux_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/wurst-client_GM479516143.pdfIn PDF document text
- https://luyenthitoanpro.com/public/upload/files/coin-master-free-spins_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_003_off00004776.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4776	25768 bytes
SHA-256: `5205998b25d82285a14645eb219954c5792092a64035f94dac410de29fcad10d`
`font_01_sfnt_off000080af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80AF	18856 bytes
SHA-256: `204886f9a3a3d456a8ba924f34e84de86e5dda13901e78a872ce278a746af401`

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