PDF malware analysis — malicious · d4adb7707e5ebfe0

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 06:48:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: f6c5eec6c0a552d957ee0cc957cb40ea SHA-1: 5138c22582880e2f1251bfe660ccd2a1c898ca41 SHA-256: d4adb7707e5ebfe0de0f157fc01a599df1c44191af01348cb1afaedb15db6819

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 structured as SEO link farms. The primary URL, http://netcdn.tw/app/431946152/get-free-robux-no-human-verification-game-hack, suggests a lure for users seeking game cheats or free currency. The ML classifier strongly indicated maliciousness, and the presence of a link farm points towards a phishing or malware distribution scheme.

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/get-free-robux-no-human-verification-game-hack PDF link annotation
- https://www.poc-helmet.com/ckfinder/userfiles/files/auto-clicker-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-pizza-cheat-engine-script_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-redeem-roblox-cards-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/code-sur-free-boost-stands-anime-fighting-simulator-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/get-everything-free-in-roblox-catalog_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-how-to-change-name-for-free_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/hacks-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/being-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-god-simulator-hack_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/downtown-rp-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-game_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
`font_00_sfnt_off00002ebe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EBE	22056 bytes
SHA-256: `83808f4da5eb12c25db5f91d3701dec01e5ac6bc744aa020d2432404dce10366`
`font_01_sfnt_off00005fb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB6	19336 bytes
SHA-256: `a90fe5938b7c8c7d620c675c61825ef91391e60c8f891a39cc2f187e1f68d0cb`

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