PDF malware analysis — malicious · 140be009b3f1a98b

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 16:05:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: da8fd4fc5901d236bf4d3b66ada92d7e SHA-1: 88869b705d036af90a155487b18294f560dfb4ba SHA-256: 140be009b3f1a98b96d6cb32d59683c0a9c4fd55b39ebaf46f08954695341b77

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on domains associated with link farms and redirectors. The document body, though heavily obfuscated, contains references to game hacks and download links, indicating a lure for users to download potentially malicious files. The presence of a malicious redirector link and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/406889139/www.coin-master-hack-apk-game-hack In PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
- http://www.ankitabrushes.com/uploaded_files/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_003_off00004b77.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B77	25604 bytes
SHA-256: `422832f1d91c627ddacb8a13525d8e6a430d6dc30e85004819b43a9ff3e84053`
`font_01_sfnt_off0000863e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x863E	18320 bytes
SHA-256: `277d4dc9d3da7fddf0bdac8681ef5ee2884fa92320bcf9e925637b910761595c`

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