PDF malware analysis — malicious · b84fe3c457df0f41

MALICIOUS

PDF

49.1 KB Created: 2021-05-14 08:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 4373512381bf3f5c0d17f7624f75e9bb SHA-1: 854b6fecf5557ce3a1604943a9c1660f262e291e SHA-256: b84fe3c457df0f41aa7428fb0533271f7e14c0772dabe4eb0ffb094d438f401b

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to sites offering "hacks" or "free spins" for popular games, suggesting a lure for users to download potentially unwanted or malicious applications. The presence of a "download button" heuristic further supports this social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

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.xyz/app/406889139/coin-master-hack-app-game-hack
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/roblox-robux-hack-generator_GM431946152.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-links-for-free-spins-2021_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-thumbnails_GM479516143.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-game-hack-online_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-2021_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-server-hack_GM406889139.pdf
- https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-root_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_003_off00004e35.bin` `52bb39f46418082dad3c300728b2747f3c1d5fbb20e098d40418833e5b58ff88`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E35	24592 bytes
`font_01_sfnt_off000086ba.bin` `9428224003c969e5bc3311fa37a1e0b8c3f40465a2abba441f39c13b7b6237f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86BA	10076 bytes
`font_02_sfnt_off00009ec9.bin` `f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EC9	17892 bytes

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