PDF malware analysis — malicious · 8a8fcfa054a3d35c

MALICIOUS

PDF

42.4 KB Created: 2021-04-30 20:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4d99337a231f37dc248106714c189503 SHA-1: c58dc65ced0a037f4276df506ea2fcbbeab388de SHA-256: 8a8fcfa054a3d35c22c97ef25019f0641fb444fd943e36c00c84990456e6b48f

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document employs a social engineering tactic by luring users with the promise of 'free Robux' and instructing them to install a browser extension or update. This is a common method to trick users into executing malicious content or providing credentials. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 5

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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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 https://netcdn.xyz/app/431946152/how-do-you-get-free-robux-no-vidio-game-hack PDF link annotation
- http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-good-hacker-names.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-boombox-games.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-unused.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-on-roblox-swordburst2.pdfIn PDF document text
- http://technibuild-group.com/uploaded_files/userfiles/files/roblox-cheat-infinite-jump.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/new-cheat-roblox-2021.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-points-on-roblox.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-captain-costumes-roblox.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-roblox-account-in-in-roblox.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/cheat-rocket-roblox.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_off0000455c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x455C	26188 bytes
SHA-256: `4ada30e6bd2ecdeb2679b98a2fea28d3e2e1123ec9ceceba2e18125f923304fa`
`font_01_sfnt_off0000819d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x819D	19040 bytes
SHA-256: `4b4181df012eff4457644c000d7edf09af964d945d21e2655ebbfb5acc3208dc`

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