PDF malware analysis — malicious · 98ed2a18d039fd40

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 15:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: bcdd10320594c073145d239fd080bb83 SHA-1: 6698ebea177046a152c795df0e8e77ce7155d8f8 SHA-256: 98ed2a18d039fd4097134a86652dd8a4639dfa0712bc773f3732b9f3f81fca45

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

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.
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/431946152/rbxoffers-com-free-robux-game-hack PDF link annotation
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/rexima-roblox-cheat-for-apocalypse-rising_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/robux-claimer_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-enter-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/freerobuxgenerator-trackid-sp006_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-download-roblox-hack-tampermonkey_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/best-roblox-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/www-roblox-games-free-com_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-robux-hacks-download_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_off00003286.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3286	22360 bytes
SHA-256: `2c4ef2f58375b687b49d62a7d45f33b60afec081a3190fdf3a60d6331dfce096`
`font_01_sfnt_off00006463.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6463	18976 bytes
SHA-256: `a0223b82be68661a8b22d1b4f0340e8af90fd6b3faac36c3bfc3d0e3dd614ada`

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