PDF malware analysis — malicious · 41c5aca1b28c2316

MALICIOUS

PDF

46.2 KB Created: 2021-05-20 04:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 397ab843313f2ae08c73e865c85c9c53 SHA-1: d29e1643a9ff2f5e7bd9d86dd0902bd77ff97034 SHA-256: 41c5aca1b28c23165d382e0e9e1c1f19e7ac73ea31d8dc4267e8da962195bee4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains lures for free Robux and Coin Master spins, directing users to external URLs that likely host malicious content. The presence of a 'Recovery secret / private key request' heuristic indicates a strong attempt to phish for sensitive user credentials. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

Heuristics 4

Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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-hacker-us-game-hack
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-hack-tool-without-verification_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-mast-hacks_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spins-generator_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spins-cheat-codes_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/does-coin-master-hack-work_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/freerobux-co_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-free-items_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-gold-cards-free_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-roblox-clothes_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/microsoft-bing-free-robux_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-vip-hack_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdf
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004b3a.bin` `206fe32072ac470565c13ff8ea70a019123248b22d48295463db74bd89e610c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B3A	26584 bytes
`font_01_sfnt_off00008741.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8741	2880 bytes
`font_02_sfnt_off0000912c.bin` `be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x912C	18600 bytes

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