PDF malware analysis — malicious · 4e83ae2ac88ec6e5

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 21:40:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8725c5039e2d3cd2c4a365f8e8745f71 SHA-1: 189a986cf8cdd3e2a9e586ce1e2f6105d3c0dd4f SHA-256: 4e83ae2ac88ec6e5d52aa587ab27737c00b1cc417ec988d4dfc168eb09518cc3

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/coin-master-free-spins-daily-game-hack PDF link annotation
- https://hotelyetihome.com/userfiles/files/comment-installer-un-cheat-sur-roblox_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/roblox-hack-inspect-element_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-pokemon-go-accounts-level-30-2021_GM1094591345.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/dll-roblox-hack-2021-february_GM431946152.pdfIn PDF document text
- https://hotelyetihome.com/userfiles/files/free-minecraft-coins_GM479516143.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_002_off00002fa8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2FA8	23164 bytes
SHA-256: `cb948a0e72161d762d8d20d14ed8705e7ae314a77b16fef8d88b11003be226af`
`font_01_sfnt_off000063e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63E2	18596 bytes
SHA-256: `9b8358e598e07f7d28a63a566b047adfcbccaa59c97f3816d59e3cdcc62e8d14`

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