PDF malware analysis — malicious · 405a6752b3e48abd

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 09:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: ddb51287f31a1b368893bda3d6354768 SHA-1: 9062a46d5fc480b0003324d1e6f7544ced138576 SHA-256: 405a6752b3e48abdfc2bb9a9021921ad4f7089ea9db352376388c8061075edf4

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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 https://netcdn.xyz/app/431946152/free-premium-roblox-game-hack PDF link annotation
- https://yontemakademi.com.tr/public/uploads/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/roblox-hack-me_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://yontemakademi.com.tr/public/uploads/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.roblox.comIn 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
`stream_003_off00004ba7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BA7	27724 bytes
SHA-256: `f0bed3f041191e2661d12af437c3c4aeefdbd1842a13bd6b5f852f99f884f87b`
`font_01_sfnt_off00008a07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A07	18620 bytes
SHA-256: `db698e20de7c3d454232d28484b91ac7eeacd2d96f4c59a267e05c3027dbd208`

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