PDF malware analysis — malicious · 4bc8dafad0808fd1

MALICIOUS

PDF

33.9 KB Created: 2021-06-22 23:56:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 5432e6c1d3b2a8255a9ed6830d5f8e15 SHA-1: b4b7be8bdc228be59156d98a1af53abd9f011992 SHA-256: 4bc8dafad0808fd1886911a869658defc98ee1fae0ed5b6d42ddd9c82b9fd337

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/robuxian-hack-to-steal-robux-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/free-robux-promo-codes-list-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-jailbreak-hack-2021-speed_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-hack-siteleri_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-de-dinero-en-jailbreak-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/como-hackear-perfiles-de-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-codes-2021-not-used-no-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-skins-ps4_GM479516143.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_off00002e8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E8C	22120 bytes
SHA-256: `837179b96f5f65c41cd6361eebecbad5aaf8e6af21c4b9d3e2b7fb20d861d598`
`font_01_sfnt_off00005f67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F67	19020 bytes
SHA-256: `db96f37d993e97422a944c3b702ae4577cddf5ba2c22c141eb79c1019d10a096`

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