PDF malware analysis — malicious · c4aa6356f0d00a52

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 14:11:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: c345ce5d0f319592bcf860a7cf0a1729 SHA-1: 0f7b01109b827b3a80b7bb0fdbab1a085f99b5b5 SHA-256: c4aa6356f0d00a5234c9fbb4044c7b39c966500c99dcef4f8ed803204cd8bb08

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/jak-zrobici-za-free-postaci-w-roblox-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/free-2021-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/toolbox-mod_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-tracker_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-i-hack-roblox-to-give-me-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-become-builders-club-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-shinobi-life-free-spins-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/games-in-roblox-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-hack-2021-ios_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-outrageous-and-robux-earrape_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_off00003132.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3132	22112 bytes
SHA-256: `8e14fe77149f5374004d30b3c93e8736ca4fe920bb8e4ca2116c946f0ee50f3b`
`font_01_sfnt_off00006237.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6237	19656 bytes
SHA-256: `708d0bd18bc64450efa26ff649babc71a6d65837baf8da1c25ee55a25e52b5d4`

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