PDF malware analysis — malicious · 09ff612dc76fc486

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 06:54:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: e5c40fa0d91dc996114e15b484b2fcc8 SHA-1: 01befec0e47fc37ecf9007da09cf439ff633f125 SHA-256: 09ff612dc76fc486f2dc2fb6223f7eb50788ffe595096391ea439446befd2874

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are identified as malicious redirectors or part of a link farm for game hacks and generators. The document body, though heavily obfuscated, contains URLs that align with these findings. The presence of a 'download button' lure and a 'password-protected archive' hint suggests a workflow designed to trick users into downloading further malicious content, likely after navigating through the provided links.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 6

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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
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-gun-games-free-game-hack In PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/fbchampion-com_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/claim-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- https://discord.ggIn 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_off0000536d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x536D	25668 bytes
SHA-256: `945f8998ee5cb63c69452a5a21669b90706916661b02c25561a72cebe2dce8c5`
`font_01_sfnt_off00008d0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D0D	2820 bytes
SHA-256: `972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714`
`font_02_sfnt_off000096ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96AD	17968 bytes
SHA-256: `8511888cd071b31a6773fc40a7c9fa25820a04ce1c2bff2e61827af067d413dd`

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