PDF malware analysis — malicious · 91e0674763bafc0a

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 03:05:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 04d61f1dc35f13245308ac9ea78d3a09 SHA-1: 575bd726ca75aa437416af2b3b636eaebbc652c0 SHA-256: 91e0674763bafc0aeb0647b6bf4e4fc109dbab70ca26709c7d5103ddcfc6ca37

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that displays a fake CAPTCHA to trick users into interacting with it. It contains an embedded URI pointing to a URL that promises free game codes, likely as a lure to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.tw/app/431946152/free-roblox-codes-that-works-game-hack
- https://www.nonglong.go.th/ddd/UserFiles/File/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-spin-today_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/roblox-font-free_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/robux-hack-no-human-verification_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-spins-coin-master-hack-2021_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/gaming-dunia-coin-master-free-spins_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-roblox_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-coins-and-spins-in-coin-master_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/how-to-hack-and-get-robux_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-no-trial-create-decals-for-roblox_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-no-gift-card_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-cheats-pc-2021_GM479516143.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/hack-coin-master-2021-pc_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/free-roblox-accounts-with-robux-2021_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/300-free-spins-coin-master_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/did-roblox-get-hacked-2021_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/roblox-tracker_GM431946152.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/do-coin-master-hacks-work_GM406889139.pdf
- https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-auto-miner-hack_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005546.bin` `a31b2850a29275dc7c8f2e261840e5d4a418c72cb143d30101af91fae3fbc7ce`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5546	25804 bytes
`font_01_sfnt_off00009139.bin` `9ec962eaf320eb06a9c8d2298ee3afe8bdb7b951a1e291fb333b0cee8783faf1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9139	18988 bytes

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