PDF malware analysis — malicious · d96db939a0a636b6

MALICIOUS

PDF

31.5 KB Created: 2021-07-19 12:22:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 63919d83807cc1a998c61992c5920003 SHA-1: 0f078736c81b93650291619567f8b40b9f4c37dc SHA-256: d96db939a0a636b6a3702031f8a5d4588fded6c4b3843a5383a7769fdec6ee44

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising free game hacks and generators. The document body and extracted URLs indicate a lure to trick users into visiting these sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9892

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/479516143/free-online-minecraft-server-game-hack In PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/minecraft-free-download-unblocked_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_off00002a33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A33	21976 bytes
SHA-256: `47f08daaa282a07114f88e9d6e55d846b9173841ad61236402d60643854c1516`
`font_01_sfnt_off00005ac7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AC7	17756 bytes
SHA-256: `14377ac3d18db81ff7447bb693ccee55c7f80471e2aeaf98ca779f1b2357c71e`

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