PDF malware analysis — malicious · b947b5b03378ff37

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 10:03:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 53d1a1c9dfbae70863296bbf11b847f6 SHA-1: 6957c8659f66544280fa9e11a2962ae4b101ee4a SHA-256: b947b5b03378ff3765344d9494f509f9c8a42742fa223762479923fcbd6c628d

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, including a primary URL pointing to a download for a 'free spins coin master daily game hack'. The PDF also exhibits characteristics of a link farm, with many URLs leading to other PDFs hosted on a similar domain, suggesting a coordinated effort to distribute potentially unwanted or malicious applications. The ML classifier also strongly indicated maliciousness.

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/406889139/free-spins-coin-master-daily-game-hack PDF link annotation
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-use-cheat-engine-on-roblox-mac_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/the-conquerors-cheats-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/1-robux-every-second-hack-robuxian_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-no-survreys_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000033cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33CF	23404 bytes
SHA-256: `f3a965a4e60ea2a4d12e23f4f84cdd0d28d2f2e8aac7e033a252c71afea07ca8`
`font_01_sfnt_off00006896.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6896	18596 bytes
SHA-256: `5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b`

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