PDF malware analysis — malicious · 7c074722c4fe11b9

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 05:18:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 39fd5dd7229c35aff5aa9db37dc5ceec SHA-1: 21ea3077ee115c8862367f51453fc585c3fbf502 SHA-256: 7c074722c4fe11b9da99bf9a892dcfc31e2857a6994a071ea25ad9571c15ab1e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users. It contains multiple embedded URLs, with a primary focus on directing users to 'netcdn.tw' and 'cosmosocean.com.tw', which are likely used to distribute malware or conduct phishing. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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/431946152/roblox-games-free-game-hack PDF link annotation
- https://cosmosocean.com.tw/upload/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-fast-speed-hack-script_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/was-roblox-hacked_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-hack_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/compte-a-hacker-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-hack-accounts-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/outlook-team-hack-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-hackfr-sans-verification_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/tiktok-for-free_GM835599320.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/retail-tycoon-roblox-money-cheat_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-cheat-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-robux-on-roblox-without-human-verification_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_off00003174.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3174	22144 bytes
SHA-256: `584e5a64f1e241bfba092b9f788288292cb33619b4b09cde544b57f88319e438`
`font_01_sfnt_off0000628c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x628C	18908 bytes
SHA-256: `84d65caee345121f03095492183b79d619b42f259b476684e3c421e4e92cd760`

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