PDF malware analysis — malicious · 8ebedc8dca766126

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 02:40:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 42541f80524204554136d28b42fe0924 SHA-1: 875b0c7921c8b0c15a10d814267605ad37817399 SHA-256: 8ebedc8dca766126b3a080eb64fd59dbb4d56d8c8df7b87a17fdc8fda646d02c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting a phishing or scam attempt. The document body, though partially garbled, contains references to popular games and terms like 'hack' and 'free', indicating a lure for users seeking cheats or in-game advantages. The ML classifier strongly flagged this PDF as malicious, and the presence of external links points towards a potential download or redirection to a malicious site.

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/hacker-tycoon-roblox-games-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/how-to-play-paid-games-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/pokemon-go-free-year_GM1094591345.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-a-free-shirt-on-roblox-without-bc_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/google-sites-roblox-hack-online_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-for-real_GM431946152.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_off00002fe8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FE8	22588 bytes
SHA-256: `64be776a53e066e4d0b78a7d5776328635c4800472ae5048b484a4a58c7cbfd1`
`font_01_sfnt_off00006168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6168	19096 bytes
SHA-256: `cf336647e13fa524d67ce7b09af46f9b5ff9c6d268dcbb45aa9ad4d3d64a7092`

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