PDF malware analysis — malicious · ba87a6909dfca768

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 21:49:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: dbb41510a15e10bfddedd341c4e88a87 SHA-1: 741925f7a21dbd191ba88678aae5c47d3f643799 SHA-256: ba87a6909dfca768b3cf2d3f8e30c1d253d60bdd3cf6e2de782ad1eb0fe98ee2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains numerous links to external websites, many of which are structured as a link farm. The document body and extracted URLs suggest a lure for users seeking free in-game currency or accounts for games like Roblox and Coin Master. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to drive traffic to potentially malicious or scam-related sites.

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/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack PDF link annotation
- http://inforplace.com.br/ckfinder/userfiles/files/roblox-jilbreak-money-free_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/free-ninja-pack-roblox_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-gamepass-in-roblox_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/mining-simulator-hack-roblox-anfr_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/f12-key-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/free-roblox-username-and-password-login_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/roblox-images_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/free-robux-cards-that-works_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/roblox-script-speed-hack-v3rmillion_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-robux-by-watching-a-video_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-hack-roblox-for-robux-on-pc_GM431946152.pdfIn PDF document text
- http://inforplace.com.br/ckfinder/userfiles/files/how-to-hack-into-your-account-on-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_off00003288.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3288	22352 bytes
SHA-256: `d83127532a97331aab0aee073c2b29c665b2bf8e5efc7b9c33645bb065b18209`
`font_01_sfnt_off000063d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63D7	19948 bytes
SHA-256: `25c875579330c816dc270a6cc831986c277f5cf3e4bf50255e97f253356454b0`

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