PDF malware analysis — malicious · 61ff95df4eefb1be

MALICIOUS

PDF

46.3 KB Created: 2021-05-15 00:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 23b1d6bc5ad95ec8dbe2e6a7d1bce2f6 SHA-1: abbee28235cdc56f7de04a59280375d6d39c39d7 SHA-256: 61ff95df4eefb1be66c21f93ce3f220eab74365e00b780ce8477b3e74be3e950

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains heuristics indicating it is malicious and uses a social-engineering lure to trick users into installing a browser extension or update. The embedded URL points to a suspicious domain, likely hosting a malicious payload. The document body, though partially corrupted, contains references to game hacks and download links, reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9278

Heuristics 4

Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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-3.5-2-hack-game-hack PDF link annotation
- https://www.similar.com.tw/upload/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/rbx-hut_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-robux-reddit_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-robux-accounts_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coins-master-hack_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
- https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off000049ce.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49CE	27744 bytes
SHA-256: `cbd8c2a8fd2a6019964c5253dd27e58fe67c8e76961b0f91fce9742d41e4c858`
`font_01_sfnt_off0000887c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x887C	2872 bytes
SHA-256: `ddcc3a5e7a6aa1de358cfa90ca854c2543f9d5fa5646cb34984d2fb90089b4d9`
`font_02_sfnt_off00009262.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9262	18216 bytes
SHA-256: `2ce71f06b10a700cf3f084aa68b33ab002ddef2a56e6912d95d46e88b5551211`

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