PDF malware analysis — malicious · 4976e7992c410156

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 08:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: b4bbd32f48438273f6a579b6ce10bb6c SHA-1: 0e3fa0cf737a353ce2dce3c6fffbb6c7c420fb6c SHA-256: 4976e7992c41015672570734fc46793072dcf67a0f7d9e427c9e704e1cbcc659

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-hack-us-game-hack PDF link annotation
- https://www.toyogas.com.tw/upload/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-working-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/cheapest-pubg-uc_GM1330123889.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/www-free-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-2021-android-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/give-me-robux-now_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/static-moonactive_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/minecraft-pe_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_off00002d9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D9D	22344 bytes
SHA-256: `db1f838468dc66b47eb6d084344ec0812d531cf7216ba35b2e99a61c58eb16f8`
`font_01_sfnt_off00005f00.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F00	18884 bytes
SHA-256: `bfc674629a4fdfc233a3c1a19cbee54387e60bd0cdfc4a3107778b42d9fa82d8`

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