PDF malware analysis — malicious · cba9420c152e9825

MALICIOUS

PDF

48.9 KB Created: 2021-05-16 13:33:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: fb7e396e702d320188a2fbe21e5acce1 SHA-1: cca4be5535e2df2c65495c4ca912a8a38ef37a7b SHA-256: cba9420c152e98258399d96ef88e4fa5541f0c680775f978890acc10b9250aff

90 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users to click on external links. The primary link, https://netcdn.xyz/app/431946152/roblox-free-robux-com-game-hack, is identified as a redirector for a game hack, suggesting a malicious intent to deliver a payload or phish credentials. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to exploit user interest in game cheats for malicious purposes, likely leading to a second-stage download or exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/roblox-free-robux-com-game-hack PDF link annotation
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c86.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C86	30900 bytes
SHA-256: `69d0626288d24a3f0080abba3cd59deb29c1f53677b2f9d428833ebcdf572e63`
`font_01_sfnt_off0000931b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x931B	2828 bytes
SHA-256: `db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6`
`font_02_sfnt_off00009cd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CD1	18348 bytes
SHA-256: `ea71f63ad969ac354b647f6e6da4581b14ed625e24a3109b04dcf91fda1e68c2`

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