PDF malware analysis — malicious · 331d8fa135052f26

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 18:25:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: fdd800fefd388e71287baa83f2ab8f73 SHA-1: a9aba152d87e22a6364bae0929bd6eea7084bea0 SHA-256: 331d8fa135052f26a491db8e3d51f13be3efe01ab255601f139f32f043e761bd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users into clicking embedded links. The primary link directs to a URL associated with game hacks, and numerous other PDF files hosted on similar domains are also referenced. While no scripts were directly extracted, the PDF structure and embedded links suggest a redirection mechanism, likely leading to a phishing or malware download site.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-groups-2021-game-hack PDF link annotation
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-100-spin-hack_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
`stream_003_off00004914.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4914	25984 bytes
SHA-256: `4eec1592010e596282194df0a364a193546cb1b4c5d197160a7291d3ed186b64`
`font_01_sfnt_off0000843b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x843B	18592 bytes
SHA-256: `40c688a228a34b1cb0523430700763228a7eb04120cc8b5f4f4e5fd2bdb4007a`

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