PDF malware analysis — malicious · c079fa936a00219b

MALICIOUS

PDF

33.9 KB Created: 2021-07-01 02:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: f68f93bd7d071caae5231a7006619090 SHA-1: d10d57a41583f83afb2ccd154c5b11ff77fd5008 SHA-256: c079fa936a00219be9ee27adcee098b9407f20e4ae3ca7a9938a8cc7a6410313

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, all pointing to sites offering game hacks and virtual currency, such as 'Robux'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/i-need-robux-game-hack PDF link annotation
- https://pfpro.de/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://pfpro.de/ckfinder/userfiles/files/minecraft-windows-10-edition-hacks_GM479516143.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_off00002f5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F5F	22112 bytes
SHA-256: `f8b92ae4f25049b3a6564185c2b50d9f6e67f3b8a40b7f54e8cf5d5095a90c1c`
`font_01_sfnt_off00006022.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6022	18728 bytes
SHA-256: `781b6f361de12558180ab6156a49b669cea89b8cb2b086f0d5291a085f2ed091`

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