PDF malware analysis — malicious · 5b899248a1ff743d

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 01:27:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 156a7d337077446b68750545d407d3bb SHA-1: acc23bfed6158780cb016ecd21d6e40cff31ef30 SHA-256: 5b899248a1ff743d6d2233c82cd69f1e3b06dfaf64376ba58c8bb2f0df73fbcb

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.tw/app/431946152/free-robux-no-downloading-apps-game-hack PDF link annotation
- https://topkoreamart.com/public/upload/files/roblox-how-to-get-free-builders-club-2021_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-pin-numbers-for-gift-cards-for-roblox_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/get-free-400-robux-robuxcodes_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-robux-net_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/roblox-free-cool-t-shirts_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/my-hero-academia-roblox-hack_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/robux-today_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/rocash-give-yourself-robux-cheat_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-downloads-roblox_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/how-do-you-get-robux-for-free-on-computer_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_off00003138.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3138	22880 bytes
SHA-256: `a1aa37274c5df9d8e3fcfe626556289d21dfadba5a0e37a75bdb91e5471fe8e7`
`font_01_sfnt_off0000649c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x649C	19592 bytes
SHA-256: `a44ac9db15e9a0f689b658e0517c09d4447592c082fac33f635fa6b58c0bc840`

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