PDF malware analysis — malicious · 3f2cccd0ee7c8cad

MALICIOUS

PDF

33.7 KB Created: 2021-06-20 20:29:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 85188a92b9529b0b602e8bcb758ac882 SHA-1: 134749ef1e8a209e29580cd143f77a01b669cc35 SHA-256: 3f2cccd0ee7c8cad2b13045dfe6162ef40510485a79927b47ed4a6e3a93a4516

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

Heuristics 5

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.
PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/mechanique-car-simulator-hack-free-roblox-game-hack PDF link annotation
- https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-robux-by-joining-a-group_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-codes-adopt-me_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-studio-are-datasotres-free_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-free-modles_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/tiktok-followers-generator-free_GM835599320.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/robux-free-c_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-coins-and-spins-in-coin-master_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_off00002cef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2CEF	21732 bytes
SHA-256: `a74f5f841a7bf4fd157c19b908f8fa037d0f2b8f493b891c5fa8961516786d6f`
`font_01_sfnt_off00005cb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CB4	19976 bytes
SHA-256: `dfc90562b80b8b64453f3836bc6f64ffec6ccd8e6dbca2d1393de5f8d46b5e05`

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