PDF malware analysis — malicious · c587e89a1dc0f9a7

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 22:27:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 6e99dac6eb3528efaf77a73135fbe086 SHA-1: 880203ffb6b6f2d6e8fbb44d48ffe9662511744c SHA-256: c587e89a1dc0f9a7870ecbb3e91adda7fcc84cb58e95ed5cffa7ea8e1b594c77

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links and a document body promoting game hacks and free currency for popular games like Coin Master and Roblox. Heuristics indicate it's a link farm designed to redirect users to potentially malicious sites. The primary URL, http://netcdn.tw/app/406889139/free-unlimited-coins-for-coin-master-game-hack, is directly associated with the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/free-unlimited-coins-for-coin-master-game-hack PDF link annotation
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-studio-free-online_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-i-hacked-place-rebuilder_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-gifts-right-now-roblox_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-nike-clothes-on-roblox_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/bloxburg-free-roblox_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-jojos-dream-adventures-hack_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-hack-robux-com_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-roblox-gift-cards-code_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_off0000336c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x336C	22748 bytes
SHA-256: `fd08e0f579199c0439b4c38b5a2f5ebf5a1398a69274df5a146b27fa6c3fa2a9`
`font_01_sfnt_off00006640.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6640	18692 bytes
SHA-256: `36a19bd20cb883ca51bc1b34291fa92e3528edb78ec616d243bb8f2f27194c6f`

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