PDF malware analysis — malicious · b7df943143b24d00

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 14:10:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 59bb4271c87d3ae6723bdfa3e6356208 SHA-1: d333707ff05745b8cc62cd954470f4c07116c158 SHA-256: b7df943143b24d008fc450d4397ca8e7d84bf2507c3d6617bf42b952516a359b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and 'game hacks' to lure victims. The primary redirector URL is http://netcdn.tw/app/431946152/get-free-robux-no-human-verification-game-hack, which is designed to lead users to potentially harmful content or further malware downloads. The ML classifier also strongly indicated maliciousness.

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/get-free-robux-no-human-verification-game-hack In PDF document text
- https://magistrinfo.ru/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://magistrinfo.ru/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://magistrinfo.ru/images/free-robux-app_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://magistrinfo.ru/images/minecraft-bedrock-edition-pc-download-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_off00002c30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C30	22760 bytes
SHA-256: `a754047674df5070e6a8d27a9ba460b6d3d8c68b8465fe3090d3f22d635779b0`
`font_01_sfnt_off00005eec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EEC	19044 bytes
SHA-256: `38fd224e0d48f9f4e428ac61794e14445b5b8d4d7f08215596fa31319312d533`

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