PDF malware analysis — malicious · 099ec0ee299f3c95

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 01:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: d6e59031a36321dc5c595c8cac15a9ca SHA-1: c4fce4c700f61e72c15b88dcaeb7d99c56e1d63b SHA-256: 099ec0ee299f3c952d977112e1e6512d260efd86cf5f45a9c9db64296a51b86b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and domains associated with free game currency lures, such as 'Roblox Fun Com Free Robux'. The heuristic firings indicate that the PDF is designed to redirect users to potentially harmful content, likely for distributing malware or phishing. No scripts were extracted, but the embedded URLs and document content strongly suggest a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/roblox-fun-com-free-robux-game-hack In PDF document text
- http://deyuan-pc.com.tw/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/free-tiktok-app_GM835599320.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/free-robux-easy_GM431946152.pdfIn PDF document text
- http://deyuan-pc.com.tw/images/how-to-download-minecraft-for-free-on-iphone_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_off00002bd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BD5	22628 bytes
SHA-256: `0f5790edc6ff35a55f36c7f214ba79a524efb453d322d8219e64ae2ecfa80e9a`
`font_01_sfnt_off00005dae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DAE	18536 bytes
SHA-256: `ad7dc2f1eeb9e76d5918f80d11ce40bc156a1362089ab5c32acf1f0efd232f81`

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