PDF malware analysis — malicious · c43839c6ffeae793

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 20:49:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: b4b81d2b6012d608f6079aeed070ac04 SHA-1: 4079d1186450b37d0541b18aac2b1eb2f20fda5e SHA-256: c43839c6ffeae793a59e582f36928682cec0a2c895357f33e0d23e72c8c47f68

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for game hacks and free currency, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to download or redirect to a malicious payload. No scripts were extracted, but the document's structure and embedded links point towards a social engineering attack.

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/406889139/free-spins-coin-master-unlimited-game-hack PDF link annotation
- https://klinikdentalestetic.com/ckfinder/userfiles/files/coin-master-facebook_GM406889139.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/roblox-how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/how-do-i-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/www-we-hack-com-roblox_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/hack-de-roblox-correr-rapido_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/roblox-cheats-how-to-get-free-obc_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/how-to-become-admin-on-roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/pubg-30-uc-free_GM1330123889.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/comment-hacker-sur-roblox-pc_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/easy-hacks-of-money-for-rocitizens-roblox_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://klinikdentalestetic.com/ckfinder/userfiles/files/coin-master-hack-free-spins_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_002_off0000320d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x320D	22732 bytes
SHA-256: `daba0e5e274572bbd83c2943cd460750a0b2d99aa2e1fb0d9f109079ed627a58`
`font_01_sfnt_off000064fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64FE	18868 bytes
SHA-256: `2ae514214ba8136a29dde69fcf4364d8dbb9380ba0bdd85285d9bbc1786d9168`

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