PDF malware analysis — malicious · a78cd4bd9e275f70

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 06:38:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 9e7fc5f025aad0a2f1ae5ff069f03e61 SHA-1: fc2bb4d96754b84241e3c04f428c8310743a36c4 SHA-256: a78cd4bd9e275f70d12922285fa55a2e83da63dd995953ba123dff6a493129fe

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, identified as a link farm, that redirect to other PDF files promising game hacks and free currency. The primary lure is for 'Roblox Studio Free Robux', directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9621

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 https://netcdn.xyz/app/431946152/roblox-studio-free-robux-game-hack PDF link annotation
- https://www.vizyonproduction.com/application/uploads/assets/files/easy-robux-today_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-level-4_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/picture-roblox_GM431946152.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.vizyonproduction.com/application/uploads/assets/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004aca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4ACA	24448 bytes
SHA-256: `9b096bd1c34e0908cfb7384f9c350d06189a46b73461aca4bed10a6bb508ab29`
`font_01_sfnt_off000082d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82D7	2940 bytes
SHA-256: `eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a`
`font_02_sfnt_off00008ce7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CE7	18484 bytes
SHA-256: `5fdc582f30145a96e28329e80bd45567e2bf6a1df475cf6931e13f95db6331fe`

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