PDF malware analysis — malicious · 13fac876c3d3b446

MALICIOUS

PDF

47.0 KB Created: 2021-06-02 18:28:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 2b527936fb3496591a09641faebd9ec5 SHA-1: 335555c3490b74c273bc301d1a78143c1a6c7617 SHA-256: 13fac876c3d3b446898ea773a17ff916d4b42a81675417451c0e897544b08753

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate content related to game cheats and generators. The document body, though heavily obfuscated, contains references to 'Free Robux Generator' and a URL pointing to a similar resource. The presence of embedded URIs and the ML classifier's high confidence score indicate malicious intent, likely to direct users to a site that either hosts malware or attempts further social engineering.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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-robux-generator-no-human-verification-no-survey-game-hack
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/como-hackear-coin-master-ios_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/what-is-coin-master-app_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/get-free-tiktok-likes_GM835599320.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-no-verification_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-roblox-hack_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/robux-matchcomfree-robux_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-roblox_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-coin-master-spins-hack_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-apk-hack_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000551b.bin` `44d414166a565cc68f56fe7e2bc401734a508d44207791541486f51f9c3df2ea`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x551B	26432 bytes
`font_01_sfnt_off000092a4.bin` `7cb633c967d780be627f2b55199c3ee469bc21ed6e33d13a57f4bcc71e6e649e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92A4	19156 bytes

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