PDF malware analysis — malicious · ac23ab2bd44119dd

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 04:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 51713ed00bdb3d84670e8ee87352c23e SHA-1: a9d3a3e9d913068fadb19356a01104599b5e9e6d SHA-256: ac23ab2bd44119dd771f7ec9aae98e50c2623e67e735f5dc0218e0116fa9411f

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/406889139/static-moonactive-net-rewards-game-hack PDF link annotation
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-com-robux_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-com-r_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
- http://greenpalm.com.tw/uploads/ckfinder/userfiles/files/safe-hack-for-coin-master-android_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_off00004960.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4960	27428 bytes
SHA-256: `10500199a4489b4a6b8bbfd4216c4f4b8133e350b368b919c4dc8398ff3d1bd3`
`font_01_sfnt_off00008888.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8888	18000 bytes
SHA-256: `9966684b9b98ae9c159578c69a57ea9c5c22f2a0e556d50b45713339f77195c2`

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