PDF malware analysis — malicious · 579f2b335e97e3d2

MALICIOUS

PDF

51.3 KB Created: 2021-06-13 20:27:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3d2e77dba707d0f49d3469bb4dcc7986 SHA-1: 1fe8be6c53bacef9ef046ca15097c37953e00881 SHA-256: 579f2b335e97e3d2e28c8799334f797288d33883bd9802e44346685a9c9d95a3

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on choidy.ch and offer game-related cheats and hacks. The primary URL http://netcdn.co/app/431946152/free-hair-on-roblox-2021-game-hack suggests a download lure. The presence of a PDF link farm and ML classification indicate malicious intent, likely to distribute malware or lead users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8646

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 http://netcdn.co/app/431946152/free-hair-on-roblox-2021-game-hack
- https://www.choidy.ch/wp-content/uploads/fsqm-files/how-to-claim-free-robux_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/real-free-robux-codes_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/istalar-robux-hack_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/silent-assassin-roblox-hack-pastebin_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/i-got-hacked-on-roblox-2021_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/free-roblox-shirts-templates_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-legit_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-free-robux-without-verification_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/how-you-get-free-roblox-money_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-account-with-robux_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-mobile-free_GM479516143.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/microsoft-free-robux_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-hackeado-de-cuenta_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/comment-avoir-robux-gratuit-2021-sur-pc-facilement-free_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-jailbreak-hack-through-walls-windows-7_GM431946152.pdf
- https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-cheat-worthiness-crab_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a9e.bin` `67b89628304f4b9048b1b9f4b8e39cf3994965691f7e3b93675e645106e52d2a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A9E	27892 bytes
`font_01_sfnt_off00008b6a.bin` `f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B6A	3964 bytes
`font_02_sfnt_off000098c8.bin` `e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98C8	3396 bytes
`font_03_sfnt_off0000a4bb.bin` `fb40fdbdeb2c912fc734ecc1a0f9350209b0b76642efb02609e415dd79d0865d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4BB	18700 bytes

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