PDF malware analysis — malicious · b05cdca2e4e3d65a

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 02:00:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: a500341e258ce033fb6e563dd5419a65 SHA-1: bbc4928aac36f9c6e17fefb1a63b58273e785957 SHA-256: b05cdca2e4e3d65a8b9656ba7ad18a6c44f091fc90e72757f06acd135b93024d

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and currency. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to download potentially harmful content. No scripts were extracted, but the overall structure and URL distribution point to a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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/479516143/minecraft-games-free-download-game-hack
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-coin-hack_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-coin-spin_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-please_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-hack-version-download-2021-ios_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/minecraft-free-install_GM479516143.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdf
- https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spins-cheat-codes_GM406889139.pdf
- https://sigmaclient.info#2
- https://flux.today#3
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b7a.bin` `caa044c6667cfc6a7462914d506b6f82fd1422c3fe511b97a872fb63ff32ac4d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B7A	25536 bytes
`font_01_sfnt_off0000861f.bin` `eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x861F	2940 bytes
`font_02_sfnt_off0000902f.bin` `ca1316f27781c6024a610b7b161693a7a162d40ad3e3bb281154e4fcfa7f8f80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x902F	18548 bytes

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