PDF malware analysis — malicious · c66771e11826e8e3

MALICIOUS

PDF

34.6 KB Created: 2021-07-02 03:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 1224d68fc1a75ee9e9d2e57799df0921 SHA-1: 42855e0a8268550236cc7301965af55b3c3c6689 SHA-256: c66771e11826e8e38b89119c3ca1a454b4486a8c7e6bb2735ff4e517c28fa99c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous links, presented as a link farm, that direct users to pages offering game hacks and cheats for popular games like Roblox. The primary URL http://netcdn.co/app/431946152/free-gear-roblox-script-pastebin-game-hack suggests the download of a script or executable. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to distribute malware.

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.co/app/431946152/free-gear-roblox-script-pastebin-game-hack PDF link annotation
- https://sitecontabil.com.br/ckfinder/userfiles/files/como-obrtener-10000-robux-de-verdad-hack_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/check-it-out-free-cellphones-roblox_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-likes-and-followers-on-tiktok_GM835599320.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-cheat-2021-fr_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-games-free-to-play-online_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/how-do-you-hack-accounts-on-roblox_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-ninja-run-roblox_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/account-over-13-years-roblox-hack_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-cheat-on-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-created-by-jess-the-gamer-girl_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/evidence-that-roblox-is-free-to-play_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/copyrighted-aritsts-hack-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_off0000307e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x307E	22320 bytes
SHA-256: `a7e7e94043633882e26b89f9282de06431183a086603efa67c02b325f371382f`
`font_01_sfnt_off000061ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61EE	19204 bytes
SHA-256: `3a60f61ff63c1560da14fd618dee037620e54484ed04f620e22fe982cc5c2036`

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