PDF malware analysis — malicious · 1736ce507bc290b0

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 21:59:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 7a3d4d9c5c28912019e2a8ad352fe169 SHA-1: aa46e9c4f5af470ec0554335f628b4e8b676f366 SHA-256: 1736ce507bc290b0b0595dc16598076d94d59a94aabb2bdd46896ac7eaa9f08a

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.tw/app/835599320/100-free-tiktok-likes-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-roblox-rs_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-zone-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/cheat-engine-fly-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/hacks-for-robloxian-highschool-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-roblox-accounts-2021-with-robux-bugmenot_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-human-verification-for-android_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
- http://phenomventures.com/In 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_off00003126.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3126	22588 bytes
SHA-256: `7b3a6dd191ef84f5bcb432a00f8899987d1985016b4d5652d2ee9e279b7d62de`
`font_01_sfnt_off000063ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63CE	18248 bytes
SHA-256: `a036984e021f7c56bd5bf65a7f460c6dd33ae50afa388712e656488f5c190f10`

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