PDF malware analysis — malicious · ee306e4a97095dd2

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 08:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 414afcbfe80e5efe8327401b06cf32f5 SHA-1: 18c2102a21be4d407713003203a31c047a00b09c SHA-256: ee306e4a97095dd283949a3663850754ad079433371d38e674c9778a95cbbe7e

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 0.9969

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 https://netcdn.xyz/app/431946152/free-robux-app-2021-game-hack PDF link annotation
- https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/robux-offers_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/i-need-robux_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://nutrafeliz.cl/ckfinder/userfiles/files/free-roblox-hack_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
`stream_003_off0000486e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x486E	26388 bytes
SHA-256: `44594369bb77a7c9ce48da90abc677936d9e7f1295a816db2f44a7a0990b3b76`
`font_01_sfnt_off00008659.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8659	18592 bytes
SHA-256: `60f15d8ca37119d38c609a47832113b3700b54b9c09a2f40fa09148dabf0e544`

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