PDF malware analysis — malicious · 33c92b799827ca5b

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 10:53:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 7d1b6fb8653df939ee5a3c74d64b4b9e SHA-1: abc34642e703f7a804eb50188e072852e5eadb3b SHA-256: 33c92b799827ca5ba5169b3a6f300037e2b2d05c5c5d3f752a6b2ceb88d362d9

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which point to files on the 'acode.com.br' domain, suggesting a link farm designed to distribute malicious content. The primary lure is 'Free Robux', a common social engineering tactic. While no scripts were directly extracted, the PDF structure and extensive link farm indicate a high likelihood of malicious intent, possibly leading to a second-stage download.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-no-downloads-2021-game-hack PDF link annotation
- https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-new-dtfb-test_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/can-people-hack-you-through-roblox_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/cool-roblox-free-games_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-button_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-july_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-games-to-play-online-roblox_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/mining-simulator-hack-roblox_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-roblox-accessories-2021_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/roblox-trade-hangout-hack_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/roblox-juwelen-hack-mad-paintball_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-stuff-roblox-march-2021_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-roblox-accounts-discord-bot_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/win-free-robux-robux-robux-free-roblox_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/how-to-use-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
- https://acode.com.br/wp-content/uploads/fsqm-files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000052da.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52DA	25488 bytes
SHA-256: `cfc1cbfd83a40409a302279cb52c2c144987017f0441a2530c1e4886e1a136de`
`font_01_sfnt_off00008cc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CC4	19224 bytes
SHA-256: `556a859407d4f38a5d7f38e1a53147c5dcb9d46fa0543b044a914df7d1291ca2`

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