PDF malware analysis — malicious · 668f4f325ae51626

MALICIOUS

PDF

33.3 KB Created: 2021-07-24 15:15:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 576a6ee410fa1b6e1b1687dfd7937844 SHA-1: ed1194984a19b520a2eb237b500b8eb9cb48e0a3 SHA-256: 668f4f325ae51626bf132d6423133638de68de80bb0f7919168d83a0d8d63404

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generator' or 'game hack' lures for popular games. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-spins-and-coins-coin-master-game-hack, which is flagged as a known malicious redirector. The document body also contains numerous links to other PDF files hosted on grandoazis.by, suggesting a chain of lures or a distribution network.

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/406889139/free-spins-and-coins-coin-master-game-hack In PDF document text
- https://grandoazis.by:443/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://grandoazis.by:443/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://grandoazis.by:443/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
- https://grandoazis.by:443/images/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://grandoazis.by:443/images/free-minecraft-codes_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_off00002dec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DEC	22840 bytes
SHA-256: `cb55722e09c78b525bb781f7fe777811253b6596a692d2e79d6e3f3da992e8de`
`font_01_sfnt_off00006106.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6106	18060 bytes
SHA-256: `d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51`

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