PDF malware analysis — malicious · 8f57c32d5692bb96

MALICIOUS

PDF

50.8 KB Created: 2021-06-03 16:29:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 24cf517d3885d8acd371a65b48163973 SHA-1: 22146111c505500e62d0eb3ebc8205f9c69ab924 SHA-256: 8f57c32d5692bb96de0d2acc61fcd63da7e17621d250769c0d1b35443bcb7322

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, disguised as a 'free generator / game hack'. This lure is intended to trick users into visiting a site that likely hosts further malicious content or exploits. The ML classifier also strongly indicated maliciousness, supporting the observed redirection behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9713

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 https://netcdn.online/app/835599320/tiktok-like-bot-free-game-hack In PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/what-is-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/xray-hack_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/100-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-generator-com_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005112.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5112	27240 bytes
SHA-256: `6c2ccc754586744bf604d50ee762915210629f9dcc3cc03dabfc763d87aea97f`
`font_01_sfnt_off00008e54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E54	3472 bytes
SHA-256: `6de29b64b59e580b0a85ded4c35b9bdc145f6064480a90e032fc9214219d9a7d`
`font_02_sfnt_off00009a4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A4C	3120 bytes
SHA-256: `49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca`
`font_03_sfnt_off0000a560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA560	17672 bytes
SHA-256: `4586a179c1ee4dcb7242a6ebe5d9b9be55f6b3291c614cdd8b5fef0fe9e318cf`

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