PDF malware analysis — malicious · c96de05b8066884f

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 06:32:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 21418e919143bc6a48063c57288cce95 SHA-1: 85bc1dfeff4663d3abbed77fe97b00566d48a007 SHA-256: c96de05b8066884f405dac0200d386270c4b87f9758d044fec74b0affc80907d

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-free-spins-link-2021-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/roblox-robux-robux-robux-free_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-speed-hack-mobile_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-warning-message-cheating_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-account-hack-system_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hack-roblox-workin-the-fuck_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/shinobi-life-roblox-hack-onyx-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-online-photoshop-for-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-hack-generator-2021-that-i-can-download_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/get-free-robux-2021_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_off00003027.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3027	22684 bytes
SHA-256: `381f6300bcf2d37a2df6aefbe4065beabbb08bb2e39cc22c904e517b2556961b`
`font_01_sfnt_off00006321.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6321	18748 bytes
SHA-256: `785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773`

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