PDF malware analysis — malicious · b9937ec3f8ca6b70

MALICIOUS

PDF

50.8 KB Created: 2021-05-12 16:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 348a6d97a33d78def989717de44656d1 SHA-1: e78bae93d13878dbfa38ed13a249f94f91a57433 SHA-256: b9937ec3f8ca6b705b442ffc51dd5c0063906ce8313f7b2542062d2fa01f56c4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. The document body and extracted URLs suggest a lure for 'free Robux' and other game-related cheats, indicating a likely attempt to direct users to malicious content or downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9349

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-verification-game-hack PDF link annotation
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-ban_GM431946152.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/coinmaster_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/hack-client_GM479516143.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
- http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004c1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C1E	32788 bytes
SHA-256: `1e3fdbfee382f4a2677a635a6247027c2a994c84499d5447c6fb518606da970d`
`font_01_sfnt_off0000982a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x982A	2824 bytes
SHA-256: `bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f`
`font_02_sfnt_off0000a1dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA1DD	19128 bytes
SHA-256: `fe2fba94a2d86c9c71a87afecb14f9f9cb432365285dbf62d8027955010708b1`

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