PDF malware analysis — malicious · 41fa6bf366d7a584

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 14:24:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 2e32f8475a4a033846f8b25323d6cc82 SHA-1: 8940f747e40052e8afe8821741f063ea6e20f5cb SHA-256: 41fa6bf366d7a5842cb7a3c57b62d4fc11725ea43259fc1d4f8ce935c6251e91

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a game hack lure to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/roblox-prison-life-hack-game-hack, redirects to a malicious domain hosting further malicious PDFs. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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/431946152/roblox-prison-life-hack-game-hack PDF link annotation
- http://hosoffices.com/ckfinder/userfiles/files/roblox-com-cheats-for-tix_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/wurst-client_GM479516143.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/how-to-hack-thinknoodles-roblox-account_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-roblox-robux-generator-2021-no-human-verification-scam_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-chloes-on-roblox_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/hack-week-2021-roblox_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/como-atravesar-paredes-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/robux-mony-free_GM431946152.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/minecraft-free_GM479516143.pdfIn PDF document text
- http://hosoffices.com/ckfinder/userfiles/files/mc-update_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
`font_00_sfnt_off00003168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3168	22380 bytes
SHA-256: `eccecaf38f5e50c7f7771d9a351ebd8edd4f89400dda11436643401a68f59c71`
`font_01_sfnt_off00006300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6300	18932 bytes
SHA-256: `757c592a10e4627f90624bfdd8f1127ea4c0f8f917493ad00ff1bc4f9e7f3eb7`

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