PDF malware analysis — malicious · ca70e8af588e623e

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 06:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4684e3045eb19ecf87a9e2625f1c23b4 SHA-1: 816aa1f08d7040a8f5630cb2ce5925f1cfe5027a SHA-256: ca70e8af588e623eeee42e00ac50c3843553f4e6e0665b409f7de6910ee70c35

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to game-related content, suggesting a link farm or a lure for malicious downloads. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a potential for malicious redirection or content delivery, likely as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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-clothes-templates-game-hack PDF link annotation
- https://www.yatatravel.com/uploaded_files/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/gain-robux_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.yatatravel.com/uploaded_files/userfiles/files/rblx-gg-free-robux_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_off00004bbf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BBF	25236 bytes
SHA-256: `d05767b0e8c2354c50279f276141601f5986a8d34a97a213cb3007d4b1348278`
`font_01_sfnt_off00008511.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8511	18884 bytes
SHA-256: `640c63db932491e4e87d0cbe8bcafce8540653682ab1762ebca962469be3fa30`

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