PDF malware analysis — malicious · 539622aea5461e29

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 16:17:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 6e035b448e91386ad295d155907489bc SHA-1: a21029c5c0c8b886ff0e0a1424b5d3276d34dff1 SHA-256: 539622aea5461e2991bb9ae075329c657562dc35c7da02ee13e774168e88c0bc

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a document body that promotes 'free Robux' and 'free spins' for games, indicating a lure for users to click malicious links. The PDF_SEO_LINK_FARM heuristic confirms a large number of external links, and the ML classifier strongly suggests maliciousness. These links likely lead to phishing sites or downloaders for further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-inspect-or-human-verification-game-hack
- https://www.ktcart.co.in/uploaded_files/userfiles/files/free-coin-master-spins-link_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/how-you-get-free-robux_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-new-free-items-2021_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-no-apps_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-support_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-daily-spin-free_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/free-spins-coin-master-links-app_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/hacks-for-coin-master_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/games-that-give-free-robux_GM431946152.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-earn-free-stars-on-coin-master_GM406889139.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/minecraft-for-free-games_GM479516143.pdf
- https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00002ec4.bin` `b01baf5905c75397c2a2a442c18efdb5a48bc77da3deb031997dbd37c0286802`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EC4	22020 bytes
`font_01_sfnt_off00005fa5.bin` `02627032178ecddd9bde089f1a3ca939f6ca198f6a776ce56e1e0a0174a852a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FA5	19488 bytes

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