PDF malware analysis — malicious · 673817ef757a3722

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 07:17:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b6af6c90d2edf90be27a874a6f708de7 SHA-1: 99104e2bfdb67c500a5ee0b42fe2f56e7c093829 SHA-256: 673817ef757a372211744041dbf3449c0d7adfad0fb1d75ed676313d44916ece

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of external links. The document body, though partially corrupted, contains text related to 'free Robux' and 'game hack', suggesting a lure for potentially malicious content. The presence of external URIs and the ML classifier's high confidence score support the assessment of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/can-u-get-free-robux-game-hack
- https://www.takathmanduhotel.com/userfiles/files/hack-coin-master-for-free_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-xyz_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-robux-meme_GM431946152.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-robux-hack-2021_GM431946152.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdf
- https://www.takathmanduhotel.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/coin-master-in-app-purchase-hack_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-with-lucky-patcher_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
- https://www.takathmanduhotel.com/userfiles/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdf
- https://www.takathmanduhotel.com/userfiles/files/pubg-uc-not-received_GM1330123889.pdf
- https://www.takathmanduhotel.com/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdf
- https://www.takathmanduhotel.com/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdf
- https://www.takathmanduhotel.com/userfiles/files/free-roblox-shirt-templates_GM431946152.pdf
- https://www.takathmanduhotel.com/userfiles/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005243.bin` `e131678bc8216f6475e9e6e331beae8465d074e3ad78d256dce0a398a0bb6509`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5243	25384 bytes
`font_01_sfnt_off00008d6d.bin` `889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D6D	2984 bytes
`font_02_sfnt_off00009799.bin` `35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9799	18532 bytes

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