PDF malware analysis — malicious · 4869e9e7aeaafab1

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 09:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: c3fb455df4998cfe0ccd83a30a5af6f6 SHA-1: dec993fa366194728a00631406af345402aa7f10 SHA-256: 4869e9e7aeaafab1d28fbba16fdf249895bf2de200fc3b44a65474938d15e724

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 0.9980

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.co/app/431946152/roblox-account-stealing-hack-pastebin-game-hack PDF link annotation
- https://www.similar.com.tw/upload/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/take-a-quize-for-free-robux-gift-card_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/addrobux-us-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/is-there-really-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-robux-without-verification-on-ipad_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/speed-hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/why-is-robux-not-free_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
`font_00_sfnt_off000031ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31AC	22096 bytes
SHA-256: `bbbe15eb18b1c66a23b3675b327e6777deb0da656ea346cde1e7bea64d786547`
`font_01_sfnt_off000062c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62C1	19176 bytes
SHA-256: `f950633b37ac324b49d31ddf4d29679f395e9a2c82f952503e01a0e88a9aadd7`

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