PDF malware analysis — malicious · c43e568f9da5efd8

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 18:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 8a9cf73aa6a7f5220f554a102e099a9c SHA-1: fac2f6c273e62ea8122bd1e98337639c76e59a1e SHA-256: c43e568f9da5efd8b5c998e1010bfc3288444f99c9e3213b89497949e2df7416

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The document body and extracted URLs suggest a lure for free in-game currency or cheats for games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used to distribute malware or lead users to phishing 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.co/app/431946152/roblox-t-shirt-free-2021-game-hack PDF link annotation
- https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/hack-gratui-pour-avoir-toute-les-gamepass-de-roblox-gratuite_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/cheat-engine-robux-hack_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/roblox-free-robux-obby-working-100_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/how-to-earn-free-robux-with-prood_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/tiktok-free-blue-tick_GM835599320.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
- https://laokhwanhos.com/ckfinder/userfiles/files/pokemon-go-free-download-hack_GM1094591345.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_off00002e57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E57	21648 bytes
SHA-256: `3d757cbfe61fff909f8d0f287f0d088196479d14c4bc30ee498694aae117a0ac`
`font_01_sfnt_off00005e1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E1D	19476 bytes
SHA-256: `cafbac8733343d85a7342062d81705664b78f1c6229d28e1c649458547353ea8`

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