PDF malware analysis — malicious · 6f7e6c16958d0c20

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 07:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 7a16f73d895a4a6c7e38beec2c56b1d0 SHA-1: b3b9fc814bf8fe0b8c3baa55bff89a9c5a45778a SHA-256: 6f7e6c16958d0c20e7e1afa22f93e634a2ef1781404aca9c0cc76d013d0a4c4c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/406889139/coinmaster-spins-game-hack PDF link annotation
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/robux-miner_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/https-nhelprobloxcom-hc-fre_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/hack-para-roblox-tycoon_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-robux-using-tampermonkey_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/claim-roblox_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/cm-spins_GM406889139.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-official-website_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_off00003400.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3400	23256 bytes
SHA-256: `ea92a0f6aa6d12fd83b9e31569b9905f750f51bd31bf580824cba727cacf57b3`
`font_01_sfnt_off00006876.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6876	18272 bytes
SHA-256: `d8860f67db87af1b46a3a45b3a8e2386644db7fe5acd3d6d31060df5d7f9a248`

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