PDF malware analysis — malicious · ef133206b7b7bcb7

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 06:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 525c9f7cffcc0ab79598751227351628 SHA-1: 9d1cef96e46df92c9f0ae52109562b23369d6a8a SHA-256: ef133206b7b7bcb7f27bf34a1ccde16b3eb782b46ff0675c0f25e03b1acfdb3f

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified as a link farm, likely intended to direct users to malicious websites. The document body, though partially corrupted, contains references to game-related cheats and free items, suggesting a lure for users seeking such content. The ML classifier strongly indicates maliciousness, and the presence of external URIs points towards a content distribution or phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/can-you-host-a-minecraft-server-for-free-game-hack PDF link annotation
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-offers_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/i-roblox-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/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-robux-for-free-xbox-one_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-kitty-roblox_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-free-ss-excutor_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-promo-code-hack-pastebin-2021_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-roblox-car_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/prisonbreaker-hack-script-roblox_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-hack-robux-cheat-engine-61_GM431946152.pdfIn PDF document text
- http://cartoriogoianira.com.br/ckfinder/userfiles/files/prooving-that-how-to-get-free-cloths-e-free-roblox_GM431946152.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
`font_00_sfnt_off00003497.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3497	22808 bytes
SHA-256: `38390681a08d43b4823e5f6c36a61d27a0854397af38a508b323acd33f03627c`
`font_01_sfnt_off00006733.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6733	18416 bytes
SHA-256: `441f603c70f76477190c3697d348d70a2c9b8049fc674739932ccc54fe89fe5f`

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