PDF malware analysis — malicious · 6d42e89ba5c533a2

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: c1c5e674f576faf5fab674b1dc0d82a9 SHA-1: d3d71eb00a94533aa8d01e739238c47f743c1b71 SHA-256: 6d42e89ba5c533a23f10fe932532cb91a9f2c721c67a192ec0e73ed7bca442b6

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/406889139/coin-master-daily-free-spins-link-facebook-game-hack PDF link annotation
- https://www.ruchya.com.tw/upload/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-free-wings_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/get-free-robux-today_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-free-800-robux-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-name-snipes-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-robux-hack-reddit_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/hack-roblox-money-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/flob-fun-roblox-hacker-generator_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-robux-codes-hack-download-pc_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/who-to-get-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-get-free-spins-on-coin-master_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_off00002e67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E67	22208 bytes
SHA-256: `5030a99cd1b8d674de0da7595451ee3e20b61bd37a94fdb2bc7c1a0751800673`
`font_01_sfnt_off00005fb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB8	18924 bytes
SHA-256: `a0d047bda18a8ecd9b1086251fa4bbdb0dcda0080a7233d126ecb60a43623744`

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