PDF malware analysis — malicious · 54de13f4c6b3628c

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 09:54:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 87ae31813d77697ed6aac4fd69c7477e SHA-1: ac1934cc1ef8f1b859673a5cac7e6ac58f70cbc2 SHA-256: 54de13f4c6b3628c35a316d0733e2d04e35f82cf0a9f2b669e7d48682fc4b64f

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and free generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates a direct attempt to trick users into clicking these links. While no scripts were extracted, the presence of multiple external links and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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 https://netcdn.online/app/479516143/minecraft-java-edition-free-game-hack PDF link annotation
- https://privatearrangements.co.nz/public/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-spin_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://privatearrangements.co.nz/public/files/coin-master-hack-unlimited-spins-and-coins-cheats_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
`stream_004_off00005411.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5411	26236 bytes
SHA-256: `cce86be68a6641c47aed954942aa4faaa468f18e25ac7153753f7ef1c0d65503`
`font_01_sfnt_off00008f1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F1A	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000098cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98CC	18164 bytes
SHA-256: `e28d0ded599416f75746d42b4ddd49ac4ed584cd54835945167b34c6d366202b`

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