PDF malware analysis — malicious · 59a8258c9fecc49a

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 07:55:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 3dc136856cf69e21399cfac6e0577e69 SHA-1: bbf04ac1ca4f1282384231b4365c214cfb9cfa54 SHA-256: 59a8258c9fecc49a83cb7da2843aea8ea30d7aa1305938c5c225fd2ce12818a7

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents promising game hacks and free currency. The primary lure appears to be 'Coin Master Free Spins' and 'Robux generators', directing users to potentially malicious or scam-related content. The presence of a 'download button' heuristic further suggests a deceptive workflow designed to trick users into clicking through these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

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/406889139/coin-master-free-spins-usa-2021-game-hack PDF link annotation
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-its-free_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-ad_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/tiktok-free-robux_GM835599320.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app_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_off00005377.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5377	25036 bytes
SHA-256: `2871c23591b4a0a3e89249c6010f487acdd8a34c02af625e33af15ddfb6f0074`
`font_01_sfnt_off00008cf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CF4	2884 bytes
SHA-256: `4d5450ce7e6d7db995ea7e6ffcd90efeba3e66825e548aa429b230fb003c0574`
`font_02_sfnt_off000096d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96D7	18472 bytes
SHA-256: `16bf174bf6dc39212a7e0095f5095cb34a7632b0870544d55dc21d8537d09f5f`

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