PDF malware analysis — malicious · a8778a1c933de4b5

MALICIOUS

PDF

35.6 KB Created: 2021-06-24 13:46:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: f4c876e9b1d8b89ec06a9c3ad8ed2c5f SHA-1: d086710f6391e73ec1654fa71402561b82f09eb2 SHA-256: a8778a1c933de4b599a3e4b9e8e350530dcef47ee5d2b2f136349194601176f6

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/406889139/free-appsfor-coin-master-daily-rewards-game-hack PDF link annotation
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-accounts_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-hack-somones-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-someone-password-in-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-hack-exploit_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/backpacking-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/como-usar-cheat-engine-67-no-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/before-dawn-hack-roblox-pastbin_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_off0000339d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x339D	22748 bytes
SHA-256: `794a8a086197918a8bd16a6a116e28fcaec5c73d71473e5ce2b30cf192e53025`
`font_01_sfnt_off000066a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66A7	18932 bytes
SHA-256: `23f2122d1e025a40a200fe5bf9e157b0cd475f9e07a39137d42bc2e355502eb2`

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