PDF malware analysis — malicious · 7aecaa523861b419

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 09:03:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: feac9881dd53fdcea95767a0b8d5aad3 SHA-1: a5d1cef31acd8cc73ff00807b87d0c9b9c278115 SHA-256: 7aecaa523861b41913b7766e9f43a6f40e90a9802145bb10cd54ef4c00a9707f

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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.xyz/app/406889139/coin-master-free-spin-now-game-hack PDF link annotation
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coins-master-hacks_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004bb5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BB5	24864 bytes
SHA-256: `addfb61d0c1d6f741bb3111f3583bf0e3e8ebfe5a25d0877e9cb60b5de5415e2`
`font_01_sfnt_off00008403.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8403	3668 bytes
SHA-256: `817bc4e88518b67a6cb47666a0f13750e06c1e97dccaf6130efe4a06ddbd0781`
`font_02_sfnt_off000090f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90F4	18052 bytes
SHA-256: `da185b0203ebc3949652e5967f83aecff7adc1a6faf65a4e6bfade67323ea1ff`

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