PDF malware analysis — malicious · 186ff85643433cc2

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 08:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 37a3348a41e41771aad6505910568fee SHA-1: 21c489ac03ec6ec0227da6ee9a130355496ef6ba SHA-256: 186ff85643433cc2b1fd66245a25c7e5d16ac67831b88901087e9f0c3404d877

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering free in-game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' heuristic further supports a malicious intent. The primary goal appears to be directing users to potentially malicious websites that may host malware or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/479516143/can-you-get-minecraft-windows-10-for-free-game-hack PDF link annotation
- https://www.hearcolors.com.mx/img/blog/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-villages_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/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/pokemon-go-x-free-download_GM1094591345.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-live_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/easy-ways-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_off00005510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5510	24384 bytes
SHA-256: `56757aeadc573fefa16afac57437db86dc21e41a87e659461b17b0d6ffd2bd93`
`font_01_sfnt_off00008bf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BF3	3104 bytes
SHA-256: `ca34f7b905d91adda4b6796f1d933ed03285a7b2bd9162ebe806dbe5dbbc6df2`
`font_02_sfnt_off00009699.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9699	18824 bytes
SHA-256: `e97784abce896f28fc49a1c6da133f9d06af890cc34ee54f88e57118c544132c`

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