PDF malware analysis — malicious · d58690f399a1e106

MALICIOUS

PDF

37.7 KB Created: 2021-07-09 06:27:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: a9a7c0a769de3b218b9c87a40ae89582 SHA-1: 8d61c5e2807eee9c8a1b1cac9724c0c6b778955e SHA-256: d58690f399a1e106e54e16a610899e1cd1758d3c29ea1197f8a2883239299d1a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9886

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/daily-coin-master-free-spin-apk-game-hack PDF link annotation
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/speed-hack-roblox-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-how-to-get-everything-free-in-the-ca_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-radio-obby-roblox_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-no-hacking-2021_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-exploit-scripts-free_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-exploits-2021-free_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/games-that-will-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.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
`font_00_sfnt_off0000326b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x326B	22636 bytes
SHA-256: `8fbc8f5dfe21fe7fc3743f79e3aa878f782befef3d9458e899bb6a17ebd5e91f`
`font_01_sfnt_off00006536.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6536	2896 bytes
SHA-256: `c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd`
`font_02_sfnt_off00006f1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F1B	18768 bytes
SHA-256: `20f7b44e526c10bc2e4fef9df4a675fd93804089751163aff3315ba8e0bc37cc`

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