PDF malware analysis — malicious · 5b2b2ff44eca3122

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 22:09:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 596f1c59395e5d55f34c1e061829d49e SHA-1: 4c89379e0315383564acea10b5214954d8ea9cec SHA-256: 5b2b2ff44eca31226ab345d409652957b4c770a2bec33af6e5fa7e8e63951979

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency to trick users into clicking a link. The embedded link, http://netcdn.tw/app/406889139/how-to-get-free-spins-and-coins-in-coin-master-game-hack, points to known malicious redirector infrastructure. The document's structure and content strongly suggest it's designed to deliver a secondary payload or lead the user to a malicious website.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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 http://netcdn.tw/app/406889139/how-to-get-free-spins-and-coins-in-coin-master-game-hack In PDF document text
- https://foc.vn/public/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-free-backpack-in-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/hack-de-robloxcom_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-what-is-e-free_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/get-knife-hack-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-strucid-free-skin-tutorial_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-games-to-get-robux_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/robux-hacktxt_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-card-codes_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_off00003099.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3099	22476 bytes
SHA-256: `25aec693c5c7f6a93b74efc9e1ddea38d7dbc2b0a63171bbf8fe0d0796d12ca7`
`font_01_sfnt_off000062a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62A5	18512 bytes
SHA-256: `54df8a09cf421af6cac57c3a8dff085e717b90c55c616740be0d1644a88c75b3`

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