PDF malware analysis — malicious · 04cf5d89897e50f0

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 21:40:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: e827bc8d842c1fd71f1b109e36eb3280 SHA-1: 6636417b1fb40068aca8943b6b0668f92ba69418 SHA-256: 04cf5d89897e50f03fdccc15ed2d62088ca153bc9db4cfead8a396f22208f0c2

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector leading to a "free generator / game hack" lure. The document body and embedded links suggest a phishing attempt to trick users into visiting potentially malicious websites. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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/how-can-you-get-free-robux-game-hack In PDF document text
- https://nexsoftech.com/upload/userfiles/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
- https://nexsoftech.com/upload/userfiles/files/minecraft-font-free_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_off00002bce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BCE	22916 bytes
SHA-256: `43d24cf870d0b9d5d2804cb5bc1290b4ce76a566a508af1e825c875e0cfb7dc0`
`font_01_sfnt_off00005f5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F5F	18860 bytes
SHA-256: `3add24dcf1475cac500c121069f698e62b0696d093573e8c97a80decf3f01ac7`

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