PDF malware analysis — malicious · 6cc81013b2a7feaf

MALICIOUS

PDF

34.9 KB Created: 2021-07-19 15:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: bb99396755743a11e7b238ee08de2fdf SHA-1: ebda8bd25548afbf311d946946fbf06bb90d0f7a SHA-256: 6cc81013b2a7feafb30471bd65ab7d0e6fde6bbec9cd73e0e7b5dc73415d99a5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising 'free Robux' or game hacks. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/free-robux-today-game-hack In PDF document text
- https://grandoazis.by:443/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://grandoazis.by:443/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
- https://grandoazis.by:443/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
- https://grandoazis.by:443/images/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
- https://grandoazis.by:443/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://grandoazis.by:443/images/minecraft-pe-free-download_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_off00002f87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F87	23488 bytes
SHA-256: `022f1a78d467c21a7550b4e71721748a4316a040a6a219d80af0b60d9da716fb`
`font_01_sfnt_off000064de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64DE	18780 bytes
SHA-256: `b89839336f543daecca7de845d957cfdcfca5db5ed981a2fc5ccd1e252f733b0`

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