PDF malware analysis — malicious · e625caac4425b8b3

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 02:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 9692b628f7fc6db071123df454e11b93 SHA-1: d347ea798262ae7ee75f80401ca39e6fd7036d0c SHA-256: e625caac4425b8b3bf72d987b1475be549f25ab216e4d1650c774663f2ad4fe4

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 0.9976

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/free-roblox-generator-game-hack PDF link annotation
- https://www.unicor.co.th/assets/editoruploads/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/earn-robux-now_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/instant-robux_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-free-hats_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/1x1x1x1-roblox-id_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_off00004961.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4961	28884 bytes
SHA-256: `9c3cca149927ec39b8db569815122dae5ce2ede322b1587844ca0f6c6326a9c7`
`font_01_sfnt_off00008a24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A24	18280 bytes
SHA-256: `a933d21998376b1e1789d4c480c6983ef3f135197d1bc74c37b8b8f8713ff5e6`

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