PDF malware analysis — malicious · 3ac8b6d97f8666d0

MALICIOUS

PDF

36.5 KB Created: 2021-07-04 12:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b594656eac3b1122437d3d2bc077177f SHA-1: 310b96e475b0aea4deba3f51fc7f236c46880243 SHA-256: 3ac8b6d97f8666d0c7ba7f0612dd58bb9a2999e7c19532e14e00cb9a80d00d7e

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a lure to download malicious content or visit phishing sites. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, likely to exploit users seeking game cheats or in-game items. The primary URL http://netcdn.tw/app/431946152/hack-jailbreak-roblox-money-game-hack is a key indicator of the payload's origin.

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/hack-jailbreak-roblox-money-game-hack
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/legit-free-spins-coin-master_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-2021-robux-for-free_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/get-minecraft-for-free_GM479516143.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-golden-suit-roblox_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-roblox-com-accounts_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-spins-for-coin-master-ios_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-hack-without-verification-2021_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-cafe-groups-on-roblox_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-hack-other-people-roblox-accoubt_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-free-robux-com_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-mods-in-minecraft_GM479516143.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-hack-coin-master-ios-2021_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/imzyf-roblox-hacks_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/claim-free-spins-coin-master_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/como-hackear-un-usuario-en-roblox_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-free-gift-card_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-2021-robux-kazokyt-game_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-fan-hack_GM406889139.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/your-free-trial-roblox-meme_GM431946152.pdf
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-apps-that-work-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_off0000367b.bin` `9667f650594260884fd7c8dc7e918b45baa32bcfbb570ef62b1ddbb659dc3752`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x367B	22788 bytes
`font_01_sfnt_off000068e1.bin` `17df90da93a51c055c6e26790a7c0e8954ab8e96a45c96be238e29eda68bb031`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68E1	19320 bytes

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