PDF malware analysis — malicious · 5f428976760a1787

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 22:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 3ebceb6b734791bebfb9992c76a1d1a3 SHA-1: 9ce8b57cd5024f92848b47cd462a745e09f91385 SHA-256: 5f428976760a1787a37078f31ccc1acf5fd5d3cc2e4a8c3c804fe5481a1db723

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes "free Robux" and game-related hacks, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links suggests a link farm intended to distribute malware or lead to phishing sites. No scripts were extracted from this sample, but the overall structure and content point to a malicious document designed for user deception.

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/free-robux-now-game-hack PDF link annotation
- https://new.minsatulearning.com/__statics/gudangsoal/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- https://new.minsatulearning.com/__statics/gudangsoal/files/hack-coin-master-with-lucky-patcher_GM406889139.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_off000030a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A0	22784 bytes
SHA-256: `2e54eae3d7f471a225fa01c0b47c38cb08dacc6943cdd54fc83cc708349001d7`
`font_01_sfnt_off000063c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63C9	18880 bytes
SHA-256: `5812b0d0ccf9dc87c8d54428ef2763728ec286cf096b79da6b6c7cfb1f79e008`

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