PDF malware analysis — malicious · 4c42fba78985b8f8

MALICIOUS

PDF

45.2 KB Created: 2021-05-10 21:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 6e3f5dd557ab1c4e0516a32da1bdb8c8 SHA-1: 9fce48726eb107cd1876649d320cf8691bf078ae SHA-256: 4c42fba78985b8f8722948e996e6445f8fa0ed094b5b17580b86d3fff02c1273

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 0.9621

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-pc-game-free-download-game-hack PDF link annotation
- http://www.donjastubica.hr/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-working_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- https://www.donjastubica.hr/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/irobux-com-redeem_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_off000047f4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x47F4	25624 bytes
SHA-256: `08bd3a1792266375ff6cf51c271d44c5133eb1e9d53231234690f1d344cb9bac`
`font_01_sfnt_off000082f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82F8	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008ce3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CE3	18704 bytes
SHA-256: `8ce66c65e478767476711e8a187d609ec807e2903d8f7500c3ed78d36e0717ab`

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