PDF malware analysis — malicious · 1b1beed734d21d33

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 04:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: af2206be101ced37362a0b4c5bb9a60c SHA-1: dd677d93f9828a017d606650226acc4ab5d3b325 SHA-256: 1b1beed734d21d33aee105e714fe6b6bb07edb301035d117b176b33a82bd1465

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/counter-blox-roblox-offensive-how-to-get-free-skins-game-hack PDF link annotation
- https://www.ruchya.com.tw/upload/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/which-group-has-free-admin-on-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-20210-robux-cheat_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/hacking-terminal-for-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/easy-way-to-get-robux-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-ban-account-hack_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/hackerlol-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-glitch_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hack-2021-no-survey_GM406889139.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_off000032ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32EA	22408 bytes
SHA-256: `a45293bd25d862bd509873ec725941573a430ff531f9fe125667729d6310826c`
`font_01_sfnt_off00006499.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6499	19464 bytes
SHA-256: `0380903f0d867d746ffd1959e6e02f4c9f149379e2fce6efdc68c855ecd5e4ee`

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