PDF malware analysis — malicious · 4a4f29c49f9638b0

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 02:30:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: c0a61afcb1bae177e437727f8883f03b SHA-1: cf3123bfc6f59f815626f375041deb6371d04cf9 SHA-256: 4a4f29c49f9638b0c0f69c64a9b6c0cca9cc202e6b1cc20b5b896c84152d9ab7

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 0.9969

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 https://netcdn.xyz/app/431946152/how-to-get-20210-robux-for-free-game-hack PDF link annotation
- https://jinghuaeye.com.tw/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-blogspot_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-master-link-today_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/coin-master-coins_GM406889139.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
- https://jinghuaeye.com.tw/upload/files/free-robux-generator_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
`stream_003_off00004b60.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B60	26996 bytes
SHA-256: `4c3bcfa1ac0d9c60e81f7b20fdc2fab6efc633867e83e36c42dfee33541dc8bb`
`font_01_sfnt_off00008798.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8798	18684 bytes
SHA-256: `6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f`

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