PDF malware analysis — malicious · 4a91f4ec437b8bee

MALICIOUS

PDF

44.2 KB Created: 2021-05-11 05:58:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 3b04104df93334ba9b8a3b1af60fda81 SHA-1: a10dc4c6ea62c0edd0d2ba0a4e9c3a4823359abd SHA-256: 4a91f4ec437b8beee347bd0d48cff1e527c8356eff70a69b7be593822459e767

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's designed to redirect users to potentially harmful content. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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 https://netcdn.xyz/app/431946152/roblox-hacked-accounts-list-game-hack PDF link annotation
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/offers-for-robux_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
- http://www.med-aid.vn/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.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_off000047e6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x47E6	30024 bytes
SHA-256: `a5cf8730f90250de7d0ccd9aa299028c45548f3471e95899b2ff296378af0ddf`
`font_01_sfnt_off00008920.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8920	18720 bytes
SHA-256: `fc7b133a6c1dcbd831a87427d92a14fbfb4bbc577a85d8c62e04ee2ff9906700`

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