PDF malware analysis — malicious · 0dda36ca993c453b

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 08:41:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: c7443d26fd4394d9a5950d107c0f999d SHA-1: e2b500c38b4182891087f5b843d56f14cb7c15b5 SHA-256: 0dda36ca993c453b9b6eabbcfa73f8ae67e30b11d83d8924c3c9ac413e77d4c4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of external links, likely to further phishing or malware distribution sites. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.tw/app/431946152/free-robux-redeem-codes-game-hack
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/roblox-cat-shirt-free_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/a-free-and-fast-way-of-getting-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/hack-coin-master-dzooka_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/point-prizes-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/roblox-online-hack-free-robux_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-make-a-roblox-shirt-for-free_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/try-coin-master-hack_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/pokemon-go-free-pokecoins-hack_GM1094591345.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/best-free-fortnite-roblox-game_GM431946152.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdf
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/robux-hack-may-2021_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_002_off0000324c.bin` `a82ebd360faf52ac79f337dbf81579f1c31fc9d3e9280fd94c20c272617bef8e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x324C	22852 bytes
`font_01_sfnt_off00006569.bin` `2beb9c583ef49ea143b974913017cf2f00d835df8237c6c52447211218059ebd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6569	19152 bytes

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