PDF malware analysis — malicious · c693c206f6ea8b8f

MALICIOUS

PDF

45.9 KB Created: 2021-05-14 07:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 957d4388f8ee59ab739441f8b83bb62d SHA-1: 7b165175db3e83a005da9334a2f0f69fa28cbf77 SHA-256: c693c206f6ea8b8feb222706337c273c3fc085e12fc7375c327c3b599bb5a888

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9432

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/how-to-get-free-daily-spins-on-coin-master-game-hack PDF link annotation
- https://diendientuvn.com/public/upload/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-free-online_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-make-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/roblox-hacks-and-cheats_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_off00004b84.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B84	25704 bytes
SHA-256: `61c622af94442f076802af451382f2bc0c68a4827340580af31f5d6e75bcabc3`
`font_01_sfnt_off00008654.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8654	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off0000903e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x903E	18472 bytes
SHA-256: `16a7f242fb8c09a8aee24ffe7eff7301392850b549ae588808710575930a759c`

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