PDF malware analysis — malicious · 55d81451f97dbe33

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 19:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 4056dd91edf94341693cd233ceeb8bfe SHA-1: 2d4988da696fa4b72753596d23975e4bdf03030b SHA-256: 55d81451f97dbe33e4aca032d7b369901047e574da629d4f6a573edb2829fb3a

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are presented as download opportunities for game cheats or currency. The ML classifier strongly indicated maliciousness, and the presence of a direct download URL further supports a malicious intent. The document's content and structure suggest it is part of a phishing or scam campaign designed to trick users into downloading unwanted or malicious files.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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.co/app/431946152/rbl-gg-free-robux-game-hack PDF link annotation
- https://www.hearcolors.com.mx/img/blog/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-level-3_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-roblox-accounts-with-obc-2021-bugmenot_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/im-gonna-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-in-meepcity-2021_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/tiktok-free-account_GM835599320.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-do-you-hack-minecraft_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
`font_00_sfnt_off00003292.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3292	21964 bytes
SHA-256: `0a4af0f10e45cacbc5069d3daf8899c9477e1abba3f5efcf21962759a2b1f49a`
`font_01_sfnt_off000062fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62FB	18788 bytes
SHA-256: `59f9ca33a2a7e44c47b5adabbc3ceacc3a6bbd6ffe2d0380a638199fee6fbfd8`

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