PDF malware analysis — malicious · 4a7aaff3308b0fce

MALICIOUS

PDF

49.9 KB Created: 2021-05-31 08:00:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 134da159bb233d664d9f6fc727a0d774 SHA-1: f772d17f6a12ba9c9d2532571188853932012850 SHA-256: 4a7aaff3308b0fce93b2c7e0b8978cb7147c87cf5946c2158bf3072cfce8fb0e

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic or distribute malicious content. The document body, though partially corrupted, contains references to 'free Robux' and a URL that further supports a lure-based attack pattern. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9365

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/431946152/comments-about-blox.com-free-robux-game-hack
- https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spins_GM406889139.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-hack-client_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-promo-codes-free-robux_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins_GM406889139.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-gift-card-codes-2021_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spins-app_GM406889139.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-paying_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-server-hacks_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-spin-free_GM406889139.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coin_GM406889139.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-dowlowd-for-free_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-online-free-download_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/rbx-fre-robux_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-generator-com-roblox-hack_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-pe-hacks_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-do-i-get-minecraft-for-free_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/free-disney-plus-accounts-tiktok_GM835599320.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-apocalypse-rising-hack_GM431946152.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/minecraft-realms-free-codes_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdf
- https://taxandmore.nl/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-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_004_off00005cc5.bin` `7d385211f3bd42d37d9279d0ea30505fb834229171afc4b6ebc806347431b9f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5CC5	29580 bytes
`font_01_sfnt_off00009f9a.bin` `2b19e0ebfa7ebbf36804a4aada1e311eddc19e76faab739df6a9ac56f90eb14b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F9A	18516 bytes

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