PDF malware analysis — malicious · 1f3a4eb6ad837d17

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 01:10:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 49173d9c0d7ada40df96afa8a491818a SHA-1: abb5c03f9833d170e44130aa7be28a54ba50f8cd SHA-256: 1f3a4eb6ad837d17a8f0ff2cfa37aeb3d1e0ac376a842a9c2e4bc49941cf6bff

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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.xyz/app/406889139/free-spin-generator-for-coin-master-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-114-download_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/robux-apk_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-people-girl_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/mcpe-free-download_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-android_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-pins_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-roblox-codes_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-official-fan-page_GM406889139.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
`stream_003_off00004994.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4994	24620 bytes
SHA-256: `0fe94c825ac1e6a111878442425a8e00971ef9f95597bad8445aff991a0844ed`
`font_01_sfnt_off000081a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81A8	17884 bytes
SHA-256: `875ea20670cc53df10756da7fc56e77b8f1dde7185e9259fbb8a92495bb142d9`

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